Shields number
E902444
The Shields number is a dimensionless parameter in sediment transport that characterizes the initiation of particle motion on a bed under fluid flow by relating shear stress to the submerged weight of the particles.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Shields number canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11053834 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Shields number Context triple: [Shields parameter, alsoKnownAs, Shields number]
-
A.
Shields
Shields is a common English and Irish surname borne by numerous notable individuals across politics, sports, entertainment, and public life.
-
B.
Shields
"Shields" is the critically acclaimed 2012 indie rock album by American band Grizzly Bear, noted for its intricate arrangements and atmospheric sound.
-
C.
Box Shield
Box Shield is a security and compliance solution from Box that provides advanced data protection, threat detection, and access controls for content stored in the Box cloud platform.
-
D.
Thunder Shield
Thunder Shield is the English meaning of the Norwegian surname "Tordenskjold," famously borne by the 18th-century naval hero Peter Tordenskjold.
-
E.
Painted Shield
Painted Shield is an American rock band and collaborative project co-founded by Pearl Jam guitarist Stone Gossard, known for blending alternative rock with experimental and electronic elements.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Shields number Target entity description: The Shields number is a dimensionless parameter in sediment transport that characterizes the initiation of particle motion on a bed under fluid flow by relating shear stress to the submerged weight of the particles.
-
A.
Shields
Shields is a common English and Irish surname borne by numerous notable individuals across politics, sports, entertainment, and public life.
-
B.
Shields
"Shields" is the critically acclaimed 2012 indie rock album by American band Grizzly Bear, noted for its intricate arrangements and atmospheric sound.
-
C.
Box Shield
Box Shield is a security and compliance solution from Box that provides advanced data protection, threat detection, and access controls for content stored in the Box cloud platform.
-
D.
Thunder Shield
Thunder Shield is the English meaning of the Norwegian surname "Tordenskjold," famously borne by the 18th-century naval hero Peter Tordenskjold.
-
E.
Painted Shield
Painted Shield is an American rock band and collaborative project co-founded by Pearl Jam guitarist Stone Gossard, known for blending alternative rock with experimental and electronic elements.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
dimensionless number
ⓘ
sediment transport parameter ⓘ |
| alsoKnownAs |
Shields criterion
NERFINISHED
ⓘ
Shields parameter ⓘ |
| appliesTo |
bed material in open-channel flow
ⓘ
noncohesive sediment ⓘ subaqueous sediment beds ⓘ |
| assumes | uniform sediment size in basic form ⓘ |
| characterizes |
incipient motion of bed particles
ⓘ
initiation of sediment motion ⓘ threshold of sediment transport ⓘ |
| criticalValueDependsOn |
bed roughness regime
ⓘ
particle Reynolds number ⓘ |
| definedAs | ratio of bed shear stress to submerged specific weight of sediment times particle diameter ⓘ |
| dependsOn |
bed shear stress
ⓘ
fluid density ⓘ gravitational acceleration ⓘ particle density ⓘ particle diameter ⓘ |
| dimension | dimensionless ⓘ |
| field |
coastal engineering
ⓘ
fluid mechanics ⓘ fluvial geomorphology ⓘ hydraulics ⓘ sediment transport ⓘ |
| introducedBy | Albert F. Shields NERFINISHED ⓘ |
| introducedIn | 1936 ⓘ |
| mathematicalForm | θ = τ / [(ρ_s − ρ) g d] ⓘ |
| namedAfter | Albert F. Shields NERFINISHED ⓘ |
| publicationContext | experiments on incipient motion of sediment in open channels ⓘ |
| relatedTo |
Shields diagram
ⓘ
critical Shields parameter ⓘ particle Reynolds number ⓘ |
| relates | bed shear stress to submerged particle weight ⓘ |
| typicalSymbol |
θ
ⓘ
τ* ⓘ |
| usedFor |
channel stability analysis
ⓘ
design of hydraulic structures ⓘ predicting onset of bedload transport ⓘ river engineering calculations ⓘ sediment mobility assessment ⓘ |
| usedWith |
Shields curve
ⓘ
dimensionless shear stress ⓘ |
| variable |
d
ⓘ
g ⓘ ρ ⓘ ρ_s ⓘ τ ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Shields number Description of subject: The Shields number is a dimensionless parameter in sediment transport that characterizes the initiation of particle motion on a bed under fluid flow by relating shear stress to the submerged weight of the particles.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.