thermal diffusivity

URNurn:iso:std:iso:80000:-5:ed-2:en:item:5-14

https://metanorma.github.io/isq-smart/quantities/part-5/t5-14
urn:iso:std:iso:80000:-5:ed-2:en:item:5-14

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-5:ed-2:en:item:5-14

IEC

urn:iec:std:iec:80000-5:2019:::item:5-14

Designations

ENthermal diffusivity

FRdiffusivité thermique

Symbol

a

Notation systems

Rendered

a

AsciiMath

a

LaTeX

a

Definition

quotient of thermal conductivity and the product of mass density and specific heat capacity:

a = \frac{λ}{ρ c_{p}}

where $λ$ is thermal conductivity (thermal conductivity), $ρ$ is mass density (ISO 80000-4: Mechanics), and $c_{p}$ is specific heat capacity at constant pressure (specific heat capacity at constant pressure)

quotient de la conductivité thermique par le produit de la masse volumique et de la capacité thermique massique:

a = \frac{λ}{ρ c_{p}}

où $λ$ est la conductivité thermique (thermal conductivity), $ρ$ est la masse volumique (ISO 80000-4: Mechanics), et $c_{p}$ est la capacité thermique massique à pression constante (specific heat capacity at constant pressure)

m^{2} \cdot s^{- 1}

Concept HierarchyPendrill (2024)

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

isq:t5-14

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	5-14
skosxl:prefLabel	"thermal diffusivity"@en
skosxl:altLabel	"a"@en
skos:definition	quotient of thermal conductivity and the product of mass density and specific heat capacity: [stem%unnumbered] ++++ a =…
isq:hasUnit	m^2*s^(-1) (square metre per second)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-5