Triple

T19319147
Position Surface form Disambiguated ID Type / Status
Subject Ludwig Prandtl E483173 entity
Predicate notableFor P22 FINISHED
Object Prandtl boundary layer
The Prandtl boundary layer is a fundamental fluid mechanics concept describing the thin region near a solid surface where viscous effects dominate and velocity changes rapidly from zero at the wall to the free-stream value.
E1369938 NE FINISHED

How this triple was built (4 steps)

Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.

NER Named-entity recognition gpt-5-mini
Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Prandtl boundary layer | Statement: [Ludwig Prandtl, notableFor, Prandtl boundary layer]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Prandtl boundary layer
Context triple: [Ludwig Prandtl, notableFor, Prandtl boundary layer]
  • A. Navier boundary condition
    The Navier boundary condition is a fluid mechanics boundary condition that allows for partial slip of a fluid along a solid surface, relating the tangential velocity at the boundary to the shear stress via a slip length.
  • B. Blasius
    Blasius is a Latinized form of the given name Blaise, historically associated with Christian saints and scholars.
  • C. Navier–Stokes equations
    The Navier–Stokes equations are fundamental partial differential equations in fluid mechanics that describe how the velocity field of a fluid evolves under forces like pressure and viscosity.
  • D. Stokes hypothesis in fluid mechanics
    The Stokes hypothesis in fluid mechanics is an assumption relating the bulk viscosity of a Newtonian fluid to its shear viscosity, simplifying the constitutive equations used to model viscous flows.
  • E. Reynolds number
    The Reynolds number is a dimensionless quantity in fluid mechanics that characterizes the flow regime of a fluid, indicating whether it is laminar or turbulent based on the ratio of inertial to viscous forces.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg Description generation gpt-5.1
Instruction
Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Prandtl boundary layer
Triple: [Ludwig Prandtl, notableFor, Prandtl boundary layer]
Generated description
The Prandtl boundary layer is a fundamental fluid mechanics concept describing the thin region near a solid surface where viscous effects dominate and velocity changes rapidly from zero at the wall to the free-stream value.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Prandtl boundary layer
Target entity description: The Prandtl boundary layer is a fundamental fluid mechanics concept describing the thin region near a solid surface where viscous effects dominate and velocity changes rapidly from zero at the wall to the free-stream value.
  • A. Navier boundary condition
    The Navier boundary condition is a fluid mechanics boundary condition that allows for partial slip of a fluid along a solid surface, relating the tangential velocity at the boundary to the shear stress via a slip length.
  • B. Blasius
    Blasius is a Latinized form of the given name Blaise, historically associated with Christian saints and scholars.
  • C. Navier–Stokes equations
    The Navier–Stokes equations are fundamental partial differential equations in fluid mechanics that describe how the velocity field of a fluid evolves under forces like pressure and viscosity.
  • D. Stokes hypothesis in fluid mechanics
    The Stokes hypothesis in fluid mechanics is an assumption relating the bulk viscosity of a Newtonian fluid to its shear viscosity, simplifying the constitutive equations used to model viscous flows.
  • E. Reynolds number
    The Reynolds number is a dimensionless quantity in fluid mechanics that characterizes the flow regime of a fluid, indicating whether it is laminar or turbulent based on the ratio of inertial to viscous forces.
  • F. None of above. chosen

Provenance (5 batches)

The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.

Step Stage Batch ID Status When
creating Elicitation batch_69d8e8d13e3c81909d91d1d5ec37c095 completed April 10, 2026, 12:10 p.m.
NER Named-entity recognition batch_69e60d868dd48190b1439a5f4ff58c48 completed April 20, 2026, 11:27 a.m.
NED1 Entity disambiguation (via context triple) batch_6a0714640aa481909bd6b1ca617f35a7 completed May 15, 2026, 12:41 p.m.
NEDg Description generation batch_6a0714eb6a0c8190bec7ae8ef785a4ab completed May 15, 2026, 12:43 p.m.
NED2 Entity disambiguation (via description) batch_6a0718ee8adc8190a74685f9783ba5d5 completed May 15, 2026, 1 p.m.
Created at: April 10, 2026, 1:32 p.m.