{ "model": { "rank": 5616, "code": "thing-q178932", "model_id": "vr.tr.reynolds-number", "name": "Reynolds number", "purpose": "Enable an agent to identify, calculate and interpret a Reynolds number while checking whether its scale choices and flow assumptions support a proposed comparison or decision.", "family": "Thing Registry", "category": "Cross-cutting context", "status": "research-draft", "kind": "thing", "plane": "XCT", "domain": "XCT.QLT", "industry": "", "version": "", "url": "/models/thing/q178932/", "tier": 2, "score": 66, "payload": { "layer": "wikidata", "aliases": [], "aliasCount": 0, "merged": 0, "knownIn": 66, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q178932", "url": "https://www.wikidata.org/wiki/Q178932", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-09T22:46:31Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 20.2, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a08859-0824-7312-acae-7a397d9b7efc\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: Reynolds number\nSense to describe: (none recorded)\nDomain code: INF.MED\nAlso known as: (none)\n\n\nContext for this batch of 188 things:\n# Batch 006: 1001 ", "usd": 0, "recall": true }, "codex": { "seconds": 60.6, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a08859-0816-73e2-a5de-6f2899076363\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: Reynolds number\nRegistry id: vr.tr.reynolds-number\nPlane / domain: INF / INF.MED\nRegistry definition: (none recorded)\nNames folded into this entry: (" } } }, "metaModel": { "id": "THING-Q178932", "registryId": "vr.tr.reynolds-number", "name": "Reynolds number", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "INF.MED" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q178932/", "model": { "registry_id": "vr.tr.reynolds-number", "name": "Reynolds number", "purpose": "Enable an agent to identify, calculate and interpret a Reynolds number while checking whether its scale choices and flow assumptions support a proposed comparison or decision.", "definition": "The Reynolds number is a dimensionless parameter, Re = ρUL/μ = UL/ν, expressing the relative importance of inertial and viscous effects in a fluid flow for specified characteristic velocity U, length L, density ρ, dynamic viscosity μ and kinematic viscosity ν.", "scope_statement": "This model owns the dimensionless Reynolds number registered as vr.tr.reynolds-number in INF / INF.MED, including its definition, contextual evaluations, scale conventions and limits of interpretation.", "in_scope": [ "The conventional definition Re = ρUL/μ = UL/ν and the meaning of each input", "Characteristic velocity and length conventions for a specified flow", "Fluid-property conditions, calculation provenance and uncertainty", "Context-dependent interpretation of inertial and viscous effects and flow regimes", "Reynolds-number matching and its limits in similarity analysis", "Explicitly identified local, bulk and generalized Reynolds-number variants" ], "out_of_scope": [ "The complete geometry and operating state of a pipe, vehicle or other physical system", "Fluid composition and constitutive behaviour except as required to select properties or a Reynolds-number definition", "Full velocity, pressure and turbulence fields", "Other dimensionless groups such as Mach, Froude and Prandtl numbers", "Complete drag, heat-transfer or pressure-loss correlations and simulation solvers" ], "distinguishing_features": [ "The conventional quantity is dimensionless and combines a velocity scale, a length scale and viscosity; velocity alone is insufficient to identify it.", "It characterizes the relative scales of inertial and viscous terms, unlike Mach number, which compares speed with sound speed.", "A numerical value is interpretable only with its velocity and length conventions; the same physical flow can have several valid Reynolds numbers.", "It is a property of a specified flow evaluation, not an intrinsic constant of a fluid or an object.", "It informs flow-regime assessment but does not provide a geometry-independent threshold separating laminar and turbulent flow." ], "characteristics": [ { "name": "Reynolds-number value", "kind": "measurement", "unit_or_values": "Dimensionless; conventionally reported as a nonnegative number", "why_it_matters": "Provides the numerical quantity used in regime assessments, correlations and similarity comparisons." }, { "name": "Definition variant", "kind": "category", "unit_or_values": "Conventional bulk, local, particle, rotational, generalized non-Newtonian or another explicitly defined variant", "why_it_matters": "Prevents comparisons between numbers computed using different equations or conventions." }, { "name": "Characteristic velocity", "kind": "measurement", "unit_or_values": "m/s, with a stated convention such as bulk mean, free stream or relative speed", "why_it_matters": "The selected velocity determines which motion and inertial scale the number represents." }, { "name": "Characteristic length", "kind": "measurement", "unit_or_values": "m, with a stated convention such as pipe diameter, hydraulic diameter, chord or distance from a leading edge", "why_it_matters": "Length selection changes the value and determines compatibility with reference evidence." }, { "name": "Fluid properties", "kind": "measurement", "unit_or_values": "Density ρ in kg/m³, dynamic viscosity μ in Pa·s, or kinematic viscosity ν in m²/s", "why_it_matters": "Supports calculation and checks that ν = μ/ρ uses properties from consistent conditions." }, { "name": "Property evaluation conditions", "kind": "relation", "unit_or_values": "Linked temperature, pressure, composition and sampling or averaging convention", "why_it_matters": "Viscosity and density must represent the fluid conditions relevant to the evaluation." }, { "name": "Flow and geometry context", "kind": "relation", "unit_or_values": "Linked flow case, geometry, location, time or operating interval", "why_it_matters": "Establishes what the number describes and which comparisons are meaningful." }, { "name": "Evaluation uncertainty", "kind": "measurement", "unit_or_values": "Interval or uncertainty estimate, with propagation method and input dependencies", "why_it_matters": "Shows whether input variation could change a regime assessment or cross a correlation's validity boundary." }, { "name": "Regime assessment", "kind": "state", "unit_or_values": "Unassessed, laminar, transitional, turbulent or indeterminate, with contextual evidence", "why_it_matters": "Keeps an interpreted flow state distinct from the calculated Reynolds number." } ], "affordances": [ "Calculate a Reynolds number from compatible inputs and an explicit scale convention.", "Check unit consistency and agreement between density-based and kinematic-viscosity formulations.", "Recalculate the number for changed operating conditions and estimate its uncertainty.", "Assess a proposed flow-regime label against evidence for the relevant geometry and conditions.", "Check whether a correlation's Reynolds-number definition and validity interval match the evaluation.", "Compare model and full-scale flows for Reynolds-number similarity while identifying additional similarity requirements." ] }, "sources": [], "structure": { "bundles": [ { "id": "definition-and-physical-meaning", "name": "Definition and physical meaning", "description": "Establishes which Reynolds number is represented and what its physical interpretation supports.", "rationale": "A dimensionless value without its defining equation can conceal incompatible quantities.", "layers": [ { "id": "defining-equation", "name": "Defining equation", "description": "Records the mathematical definition and relationships among its inputs.", "findings": [ { "id": "conventional-reynolds-number", "name": "Conventional Reynolds number", "description": "The conventional form is Re = ρUL/μ = UL/ν, with ν = μ/ρ and explicitly chosen velocity and length scales.", "questions": [ { "text": "Which defining equation and Reynolds-number symbol does this evaluation use?", "kind": "definition", "id": "conventional-reynolds-number-q01" }, { "text": "Do the input units cancel, and do both formulations agree when evaluated from consistent properties?", "kind": "measurement", "id": "conventional-reynolds-number-q02" } ] } ] }, { "id": "interpretive-boundary", "name": "Interpretive boundary", "description": "Separates a scaling interpretation from a direct observation of flow behaviour.", "findings": [ { "id": "inertial-viscous-scaling", "name": "Inertial and viscous scaling", "description": "Reynolds number characterizes the relative scales of inertial and viscous terms; it is not generally a directly measured ratio of total forces on a body.", "questions": [ { "text": "Which flow scales and governing assumptions justify the inertial-to-viscous interpretation here?", "kind": "definition", "id": "inertial-viscous-scaling-q01" }, { "text": "What proposed conclusion would require evidence beyond the Reynolds-number value?", "kind": "boundary", "id": "inertial-viscous-scaling-q02" } ] } ] } ] }, { "id": "flow-scales-and-reference-context", "name": "Flow scales and reference context", "description": "Makes velocity, length and evaluation location explicit.", "rationale": "Scale conventions determine the value and whether it can be compared with published results.", "layers": [ { "id": "velocity-and-length-selection", "name": "Velocity and length selection", "description": "Connects characteristic scales to the actual motion and geometry.", "findings": [ { "id": "compatible-scale-pair", "name": "Compatible scale pair", "description": "Bulk pipe velocity, free-stream velocity and particle-relative velocity refer to different flow situations; each must be paired with a justified length convention.", "questions": [ { "text": "Is U a bulk mean, free-stream, local or relative velocity, and how was it obtained?", "kind": "measurement", "id": "compatible-scale-pair-q01" }, { "text": "Why is the selected diameter, hydraulic diameter, chord or other length appropriate to the intended interpretation?", "kind": "boundary", "id": "compatible-scale-pair-q02" } ] } ] }, { "id": "local-and-bulk-evaluations", "name": "Local and bulk evaluations", "description": "Distinguishes a whole-flow reference number from a location-dependent evaluation.", "findings": [ { "id": "evaluation-support", "name": "Evaluation location and interval", "description": "A Reynolds number based on distance along a surface differs from one based on total body length; time and spatial averaging choices also require identification.", "questions": [ { "text": "Which location, reference origin, time or averaging interval does this number describe?", "kind": "measurement", "id": "evaluation-support-q01" }, { "text": "Do the compared values use the same local or bulk convention, or is a documented conversion needed?", "kind": "action", "id": "evaluation-support-q02" } ] } ] } ] }, { "id": "fluid-properties-and-calculation-quality", "name": "Fluid properties and calculation quality", "description": "Controls property selection, numerical reproducibility and sensitivity.", "rationale": "A correct equation can still produce a misleading result when viscosity conditions or input uncertainty are ignored.", "layers": [ { "id": "property-evaluation", "name": "Property evaluation", "description": "Associates viscosity and density with an identifiable fluid state.", "findings": [ { "id": "consistent-fluid-state", "name": "Consistent fluid state", "description": "Density and viscosity require identified evaluation conditions; substantial property variation may make one reference Reynolds number insufficient.", "questions": [ { "text": "Which measured data or property source supplies viscosity and density, and at what conditions?", "kind": "provenance", "id": "consistent-fluid-state-q01" }, { "text": "Are properties evaluated at bulk, wall, film or local conditions, and what justifies that choice?", "kind": "boundary", "id": "consistent-fluid-state-q02" } ] } ] }, { "id": "uncertainty-and-reproducibility", "name": "Uncertainty and reproducibility", "description": "Tracks the calculation's inputs, dependencies and decision sensitivity.", "findings": [ { "id": "traceable-value-and-range", "name": "Traceable value and range", "description": "The reported value should be reproducible from recorded inputs, with uncertainty or operating variation distinguished from rounding.", "questions": [ { "text": "What Reynolds-number range follows from input uncertainties and any dependencies among those inputs?", "kind": "measurement", "id": "traceable-value-and-range-q01" }, { "text": "Would that range change the selected regime assessment or invalidate the intended correlation?", "kind": "action", "id": "traceable-value-and-range-q02" } ] } ] } ] }, { "id": "flow-regimes-and-correlation-use", "name": "Flow regimes and correlation use", "description": "Constrains decisions made from the calculated number.", "rationale": "Transition criteria and empirical formulas apply to particular geometries, disturbances and definitions.", "layers": [ { "id": "regime-evidence", "name": "Regime evidence", "description": "Links regime labels to relevant observations or qualified criteria.", "findings": [ { "id": "context-dependent-transition", "name": "Context-dependent transition", "description": "Transition cannot be assigned from one universal critical Reynolds number; geometry, inlet disturbances, roughness and flow history may affect the assessment.", "questions": [ { "text": "Which source supports the proposed transition criterion for this geometry and Reynolds-number convention?", "kind": "provenance", "id": "context-dependent-transition-q01" }, { "text": "What observations or operating conditions support, contradict or leave uncertain the proposed regime label?", "kind": "boundary", "id": "context-dependent-transition-q02" } ] } ] }, { "id": "correlation-eligibility", "name": "Correlation eligibility", "description": "Checks Reynolds-number compatibility before applying an external correlation.", "findings": [ { "id": "definition-and-range-match", "name": "Definition and range match", "description": "A correlation requires agreement with its Reynolds-number definition and validity range, alongside its other stated conditions.", "questions": [ { "text": "Does the correlation use the same characteristic scales and fluid-property evaluation convention?", "kind": "boundary", "id": "definition-and-range-match-q01" }, { "text": "Is the evaluation, including its uncertainty range, within the correlation's supported domain?", "kind": "action", "id": "definition-and-range-match-q02" } ] } ] } ] }, { "id": "similarity-and-definition-extensions", "name": "Similarity and definition extensions", "description": "Handles scale comparisons and departures from the conventional formulation.", "rationale": "Equal numbers do not establish complete dynamic similarity, and generalized definitions require explicit treatment.", "layers": [ { "id": "reynolds-similarity", "name": "Reynolds similarity", "description": "Assesses what matching Reynolds numbers establishes between flow cases.", "findings": [ { "id": "conditional-scale-comparison", "name": "Conditional scale comparison", "description": "Matching Reynolds numbers supports similarity of inertial and viscous scaling when relevant geometry and boundary conditions correspond; other physical effects can impose additional requirements.", "questions": [ { "text": "Which model and reference flows are being compared, and are their geometry and boundary conditions suitably similar?", "kind": "boundary", "id": "conditional-scale-comparison-q01" }, { "text": "Which additional effects or dimensionless groups must be checked before transferring results?", "kind": "action", "id": "conditional-scale-comparison-q02" } ] } ] }, { "id": "generalized-definitions", "name": "Generalized definitions", "description": "Identifies variants whose equations depend on rheology or specialized flow conventions.", "findings": [ { "id": "explicit-variant-assumptions", "name": "Explicit variant assumptions", "description": "Non-Newtonian and other specialized applications may use generalized Reynolds numbers whose equations and supporting criteria must be recorded rather than assumed interchangeable with Re = UL/ν.", "questions": [ { "text": "Which source defines this variant, including its constitutive assumptions, parameters and numerical factors?", "kind": "provenance", "id": "explicit-variant-assumptions-q01" }, { "text": "Which comparisons or transition criteria remain valid under this definition, and which require separate evidence?", "kind": "boundary", "id": "explicit-variant-assumptions-q02" } ] } ] } ] }, { "id": "evidence-and-external-alignment", "name": "Evidence and external alignment", "description": "What the world already says about this thing, gathered so the model can be checked against it.", "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.", "layers": [ { "id": "reported-evidence", "name": "Reported evidence", "description": "Findings from the breadth pass, kept separate from the structural claims.", "findings": [ { "id": "evidence-confidence-notes", "name": "Check these first", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "This account is recalled knowledge; no sources or standards were consulted.", "The supplied domain code INF.MED needs checking against the registry taxonomy; the conventional referent is a fluid-mechanics quantity.", "Transition thresholds and generalized definitions require geometry, disturbance conditions, fluid rheology and characteristic-scale conventions to be specified." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of Reynolds number this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-kinds", "name": "Kinds and varieties", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Pipe Reynolds number based on mean velocity and internal diameter", "Hydraulic-diameter Reynolds number for noncircular ducts", "Local Reynolds number based on distance along a surface", "Particle Reynolds number based on particle size and relative velocity", "Chord Reynolds number for flow around an airfoil", "Generalized Reynolds number for non-Newtonian flow" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of Reynolds number this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-identifiers", "name": "Identifiers and schemes", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "scheme": "Conventional mathematical notation", "value_or_pattern": "Re, often subscripted to indicate the characteristic length", "note": "A quantity symbol rather than a unique registry identifier; its velocity and length conventions must be stated." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of Reynolds number this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Assessing whether laminar, transitional or turbulent flow is plausible in a specified geometry.", "Matching inertial and viscous effects between scale models and full-scale systems.", "Selecting applicable pipe-friction and pressure-loss correlations.", "Characterizing aerodynamic and hydrodynamic operating conditions.", "Selecting drag, heat-transfer and mass-transfer correlations within their stated validity ranges." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of Reynolds number this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-measurements", "name": "Typical measurements", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "quantity": "Reynolds number", "typical_range": "No universal range; Re much less than 1 indicates creeping-flow conditions under the usual scaling assumptions.", "unit": "1 (dimensionless)" }, { "quantity": "Pipe Reynolds number", "typical_range": "For ordinary Newtonian flow in a straight circular pipe, approximately below 2300 is conventionally laminar, 2300-4000 transitional, and above 4000 usually turbulent; these are practical guides rather than universal boundaries.", "unit": "1 (dimensionless)" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of Reynolds number this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Using an inappropriate characteristic length or velocity can invalidate comparisons and correlation choices.", "Applying pipe-flow transition thresholds to other geometries can misclassify the flow regime.", "Ignoring temperature-dependent viscosity can materially distort the calculated Reynolds number.", "Matching Reynolds number alone does not ensure similarity when compressibility, gravity, free surfaces or other effects matter.", "Applying Newtonian-fluid definitions and correlations uncritically to non-Newtonian fluids can produce misleading predictions." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of Reynolds number this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "name": "Reynolds stress", "difference": "Reynolds stress represents turbulent momentum transport through velocity-fluctuation correlations; Reynolds number compares inertial and viscous effects." }, { "name": "Mach number", "difference": "Mach number compares flow speed with sound speed and characterizes compressibility effects." }, { "name": "Froude number", "difference": "Froude number compares inertial and gravitational effects." }, { "name": "Péclet number", "difference": "Péclet number compares advective transport with thermal or mass diffusion rather than momentum diffusion." }, { "name": "Turbulence", "difference": "Turbulence is a flow regime; Reynolds number is a parameter that helps characterize conditions under which that regime may occur." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of Reynolds number this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Does an existing Vercy world model already own Reynolds number, requiring this registry entry to link to that publication?", "Which authoritative references should anchor the conventional definition and characteristic-scale conventions in the researched publication?", "Which flow geometries need sourced transition criteria, and how should those criteria express uncertainty and sensitivity to disturbances?", "Which generalized Reynolds-number definitions should be represented within this entry, with explicit equations and applicability boundaries?", "For flows with strongly varying properties, which reference-state or local-evaluation conventions should the publication support?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 17, "questions": 27 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "abstract concept", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a Reynolds number, record what state it is in, and decide what may be done with it.", "whatItIs": "Enable an agent to identify, calculate and interpret a Reynolds number while checking whether its scale choices and flow assumptions support a proposed comparison or decision.", "characteristics": { "substance": "abstract", "origin": "conceptual", "agency": "inert" }, "whatYouCanDoWithIt": [ "observed and measured" ], "distinguishingFeatures": [ "Described in 66 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a Reynolds number, and on what evidence are they told apart?" ], "whatItIsMadeOf": "an abstraction with no physical instance", "physicalCharacter": [ "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "observe it, measure it, record its state" ], "howItIsRecognised": [ "Nothing to see. What is recognised is an instance of it, and which instances count is exactly what is argued about." ], "relatedModels": [], "standing": "Described in 66 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one Reynolds number from another, and a Reynolds number from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a Reynolds number, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a Reynolds number, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a Reynolds number is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a Reynolds number, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a Reynolds number, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a Reynolds number is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a Reynolds number sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a Reynolds number, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a Reynolds number, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a Reynolds number is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a Reynolds number from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a Reynolds number, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a Reynolds number, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a Reynolds number is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a Reynolds number passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a Reynolds number between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a Reynolds number, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a Reynolds number, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a Reynolds number is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a Reynolds number, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a Reynolds number is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a Reynolds number, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a Reynolds number, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a Reynolds number is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "definitions-in-contest", "name": "Definitions and who holds them", "description": "What Reynolds number is taken to mean, and by whom.", "rationale": "When a field disagrees about a concept, the disagreement is the content. A model that picks one definition silently destroys the information.", "layers": [ { "id": "competing-definitions", "name": "Competing definitions", "description": "The main readings and the traditions behind them.", "findings": [ { "id": "definition-map", "name": "Definitions and their holders", "description": "Each definition with the school or body that holds it.", "questions": [ { "id": "definition-map-q01", "text": "Which definitions of Reynolds number are in use, and which tradition or body holds each?", "kind": "definition" }, { "id": "definition-map-q02", "text": "What turns on the difference between them in practice?", "kind": "boundary" } ] } ] }, { "id": "operationalisation", "name": "Operationalisation", "description": "How it is measured or applied when it has to be.", "findings": [ { "id": "operational-record", "name": "Measures and proxies", "description": "Instruments and indicators used to stand in for it.", "questions": [ { "id": "operational-record-q01", "text": "How is Reynolds number operationalised or measured in practice, and by what instrument?", "kind": "measurement" }, { "id": "operational-record-q02", "text": "What does that operationalisation leave out, and when does that matter?", "kind": "boundary" } ] } ] } ] }, { "id": "instances-and-use", "name": "Instances, use and consequence", "description": "What counts as an instance of Reynolds number and what follows from calling something that.", "rationale": "Applying a concept is an act with consequences, so a model must say what the label licenses and what it does not.", "layers": [ { "id": "instances", "name": "What counts as an instance", "description": "Clear cases, borderline cases and non-cases.", "findings": [ { "id": "instance-tests", "name": "Tests for an instance", "description": "What would settle whether something falls under it.", "questions": [ { "id": "instance-tests-q01", "text": "What would settle whether something is an instance of Reynolds number?", "kind": "boundary" }, { "id": "instance-tests-q02", "text": "Which borderline cases are argued about, and on what grounds?", "kind": "definition" } ] } ] }, { "id": "consequence", "name": "Consequence of application", "description": "Rights, duties or decisions that follow from the label.", "findings": [ { "id": "consequence-record", "name": "What the label licenses", "description": "What an agent may do once something is classified this way.", "questions": [ { "id": "consequence-record-q01", "text": "What follows practically once something is treated as Reynolds number?", "kind": "action" }, { "id": "consequence-record-q02", "text": "What must an agent not infer from the label alone?", "kind": "action" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a Reynolds number came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a Reynolds number and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a Reynolds number, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a Reynolds number, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a Reynolds number is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a Reynolds number is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a Reynolds number, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a Reynolds number, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a Reynolds number is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 5, "layers": 10, "findings": 12, "questions": 32 } } } }