Chandrasekhar number
E7941
The Chandrasekhar number is a dimensionless quantity in magnetohydrodynamics that measures the relative importance of magnetic forces compared to viscous forces in a conducting fluid.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Chandrasekhar number canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T93528 — 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: Chandrasekhar number Context triple: [Subrahmanyan Chandrasekhar, knownFor, Chandrasekhar number]
-
A.
Kasner
Kasner is the birth surname of former German chancellor Angela Merkel, reflecting her family name before marriage.
-
B.
Drake equation
The Drake equation is a probabilistic formula used to estimate the number of technologically advanced extraterrestrial civilizations that might exist in our galaxy.
-
C.
Boltzmann constant
The Boltzmann constant is a fundamental physical constant that links temperature to energy at the particle level, playing a central role in statistical mechanics and thermodynamics.
-
D.
Kretschmann scalar
The Kretschmann scalar is a curvature invariant in general relativity that combines components of the Riemann tensor into a single scalar quantity used to characterize the intensity of spacetime curvature, especially near singularities.
-
E.
Bardeen
Bardeen is a surname most notably associated with John Bardeen, the American physicist who won the Nobel Prize in Physics twice for his work on the transistor and superconductivity.
- 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: Chandrasekhar number Target entity description: The Chandrasekhar number is a dimensionless quantity in magnetohydrodynamics that measures the relative importance of magnetic forces compared to viscous forces in a conducting fluid.
-
A.
Kasner
Kasner is the birth surname of former German chancellor Angela Merkel, reflecting her family name before marriage.
-
B.
Drake equation
The Drake equation is a probabilistic formula used to estimate the number of technologically advanced extraterrestrial civilizations that might exist in our galaxy.
-
C.
Boltzmann constant
The Boltzmann constant is a fundamental physical constant that links temperature to energy at the particle level, playing a central role in statistical mechanics and thermodynamics.
-
D.
Kretschmann scalar
The Kretschmann scalar is a curvature invariant in general relativity that combines components of the Riemann tensor into a single scalar quantity used to characterize the intensity of spacetime curvature, especially near singularities.
-
E.
Bardeen
Bardeen is a surname most notably associated with John Bardeen, the American physicist who won the Nobel Prize in Physics twice for his work on the transistor and superconductivity.
- F. None of above. chosen
Statements (35)
| Predicate | Object |
|---|---|
| instanceOf |
dimensionless number
ⓘ
magnetohydrodynamic parameter ⓘ |
| appearsIn |
linear stability analyses of MHD flows
ⓘ
theory of thermal convection in a magnetic field ⓘ |
| appliesTo |
electrically conducting fluids
ⓘ
magnetoconvection ⓘ magnetohydrodynamic stability problems ⓘ |
| category |
dimensionless numbers in fluid dynamics
ⓘ
dimensionless numbers in magnetohydrodynamics ⓘ |
| dependsOn |
characteristic length scale
ⓘ
electrical conductivity of the fluid ⓘ kinematic viscosity of the fluid ⓘ magnetic field strength ⓘ |
| describes | relative importance of magnetic forces in a conducting fluid ⓘ |
| field | magnetohydrodynamics ⓘ |
| hasDimension | dimensionless ⓘ |
| indicates |
dominance of magnetic forces when large
ⓘ
dominance of viscous forces when small ⓘ |
| measures | ratio of magnetic forces to viscous forces ⓘ |
| namedAfter | Subrahmanyan Chandrasekhar ⓘ |
| relatedTo |
Hartmann number
ⓘ
Prandtl number ⓘ Rayleigh number ⓘ magnetic Prandtl number ⓘ |
| symbol | Q ⓘ |
| usedBy |
astrophysicists
ⓘ
fluid dynamicists ⓘ geophysicists ⓘ plasma physicists ⓘ |
| usedFor |
analyzing onset of magnetoconvection
ⓘ
characterizing magnetically influenced convection ⓘ studying stability of conducting fluid layers in magnetic fields ⓘ |
| usedIn |
astrophysical fluid dynamics
ⓘ
engineering magnetohydrodynamics ⓘ geophysical fluid dynamics ⓘ |
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: Chandrasekhar number Description of subject: The Chandrasekhar number is a dimensionless quantity in magnetohydrodynamics that measures the relative importance of magnetic forces compared to viscous forces in a conducting fluid.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.