Part 11: Characteristic Numbers·115 entries

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11-8.5

Hartmann number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-8.5

https://metanorma.github.io/isq-smart/quantities/part-11/t11-8.5
urn:iso:std:iso:80000:-11:ed-2:en:item:11-8.5

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-8.5

IEC

urn:iec:std:iec:80000-11:2019:::item:11-8.5

Designations

ENHartmann number

FRnombre de Hartmann

Symbol

H a

Notation systems

Rendered

H a

AsciiMath

Ha

LaTeX

H a

Definition

relation between magnetically induced stress and hydrodynamic shear stress in an electrically conducting fluid, expressed by

$H a = B l \sqrt{(σ / μ)}$ ; where

$B$ :: is magnetic flux density (IEC 80000-6: Electromagnetism),

$l$ :: is characteristic length (ISO 80000-3: Space and time),

$σ$ :: is electrical conductivity (IEC 80000-6: Electromagnetism), and

$μ$ :: is dynamic viscosity (ISO 80000-4: Mechanics)

relation entre la contrainte induite magnétiquement et la contrainte tangentielle hydrodynamique dans un fluide conducteur de courant électrique, exprimée par

$H a = B l \sqrt{(σ / η)}$ ; où

$B$ :: est l'induction magnétique (IEC 80000-6: Electromagnetism),

$l$ :: est la longueur caractéristique (ISO 80000-3: Space and time),

$σ$ :: est la conductivité électrique (IEC 80000-6: Electromagnetism), et

$η$ :: est la viscosité dynamique (ISO 80000-4: Mechanics)

Notes

The Hartmann number represents also the ratio of magnetic force to viscous force.

Le nombre de Hartmann représente également le rapport de la force magnétique à la force visqueuse.

Referenced by

Chandrasekhar number Lundquist number

Concept HierarchyPendrill (2024)

1dimensionless quantitiesLevel 0 · Kind

Broader concepts

◇ dimensionless quantities

Ontology
isq:Quantity smart:TermEntry

Class Hierarchy

smart:Entity smart:TermEntryisq:Quantity

A physical quantity as defined in ISO/IEC 80000, with associated symbols, definitions, and units of measurement.

Instance IRI

isq:t11-8.5

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-8.5
skosxl:prefLabel	"Hartmann number"@en
skosxl:altLabel	"Ha"@en
skos:definition	relation between magnetically induced stress and hydrodynamic shear stress in an electrically conducting fluid, expresse…
skos:note	The Hartmann number represents also the ratio of magnetic force to viscous force.
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-11

Related Entities

isq:QuantityShape isq:part-11 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry