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12-18

Lorenz coefficient

URNurn:iso:std:iso:80000:-12:ed-2:en:item:12-18

https://metanorma.github.io/isq-smart/quantities/part-12/t12-18
urn:iso:std:iso:80000:-12:ed-2:en:item:12-18

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-12:ed-2:en:item:12-18

IEC

urn:iec:std:iec:80000-12:2019:::item:12-18

Designations

ENLorenz coefficient

FRcoefficient de Lorenz

Symbol

L

Notation systems

Rendered

L

AsciiMath

L

LaTeX

L

Definition

quotient of thermal conductivity (ISO 80000-5: Thermodynamics), and the product of electric conductivity (IEC 80000-6: Electromagnetism) and thermodynamic temperature (ISO 80000-3: Space and time)

quotient de la conductivité thermique (ISO 80000-5: Thermodynamics) par le produit de la conductivité électrique (IEC 80000-6: Electromagnetism) et de la température thermodynamique (ISO 80000-3: Space and time)

Units

\frac{V^{2}}{K^{2}}

volt squared per kelvin squared

View related quantities →

k g^{2} \cdot m^{4} \cdot s^{- 6} \cdot A^{- 2} \cdot K^{- 2}

kilogram squared metre to the fourth per second to the sixth per ampere squared kelvin squared

View related quantities →

Notes

The Lorenz coefficient can be expressed by

L = \frac{λ}{σ T}

where $λ$ is thermal conductivity (ISO 80000-5: Thermodynamics), $σ$ is electric conductivity (IEC 80000-6: Electromagnetism), and $T$ is thermodynamic temperature (ISO 80000-5: Thermodynamics).

Le coefficient de Lorenz peut s'exprimer comme suit :

L = \frac{λ}{σ T}

où $λ$ est la conductivité thermique (ISO 80000-5: Thermodynamics), $σ$ est la conductivité électrique (IEC 80000-6: Electromagnetism) et $T$ est la température thermodynamique (ISO 80000-5: Thermodynamics).

Concept HierarchyPendrill (2024)

L⁴ M² T⁻⁶ I⁻² Θ⁻²L⁴ M² T⁻⁶ I⁻² Θ⁻² quantitiesLevel 0 · Kind

Broader concepts

◇ L⁴ M² T⁻⁶ I⁻² Θ⁻² 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:t12-18

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	12-18
skosxl:prefLabel	"Lorenz coefficient"@en
skosxl:altLabel	"L"@en
skos:definition	quotient of thermal conductivity (<<iso80000-5>>), and the product of electric conductivity (<<iec80000-6>>) and thermod…
skos:note	The Lorenz coefficient can be expressed by [stem%unnumbered] ++++ L = lambda/(sigma T) ++++ where stem:[lambda] is the…
isq:hasUnit	V^2/K^2 (volt squared per kelvin squared)kg^2m^4s^(-6)A^(-2)K^(-2) (kilogram squared metre to the fourth per second to the sixth per ampere squared kelvin squared)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-12

Related Entities

isq:QuantityShape isq:part-12 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry