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Section 9-402 entries

9-40.1thermal diffusion ratio 9-40.2thermal diffusion factor

9-40.1

thermal diffusion ratio

URNurn:iso:std:iso:80000:-9:ed-2:en:item:9-40.1

https://metanorma.github.io/isq-smart/quantities/part-9/t9-40.1
urn:iso:std:iso:80000:-9:ed-2:en:item:9-40.1

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-9:ed-2:en:item:9-40.1

IEC

urn:iec:std:iec:80000-9:2019:::item:9-40.1

Designations

ENthermal diffusion ratio

FRrapport de diffusion thermique

Symbol

k_{T}

Notation systems

Rendered

k_{T}

AsciiMath

k_T

LaTeX

k_{T}

Definition

in a steady-state of a binary mixture in which thermal diffusion occurs, proportionality factor between gradient of the amount-of-substance fraction $x_{B}$ (amount-of-substance fraction) of the heavier substance $B$ , and negative gradient of the local thermodynamic temperature $T$ (ISO 80000-5: Thermodynamics) divided by that temperature (ISO 80000-5: Thermodynamics):

grad x_{B} = - (k_{T} / T) grad T

dans l'état au repos d'un mélange binaire où la diffusion thermique se produit, facteur de proportionnalité entre le gradient de la fraction de quantité de matière $x_{B}$ (amount-of-substance fraction) du constituant le plus lourd $B$ , et le quotient de l'opposé du gradient de température thermodynamique (ISO 80000-5: Thermodynamics) locale $T$ par cette température (ISO 80000-5: Thermodynamics):

grad x_{B} = - (k_{T} / T) grad T

Units

1

one

View related quantities →

Referenced by

thermal diffusion factor thermal diffusion coefficient

Concept HierarchyPendrill (2024)

1dimensionless quantitiesLevel 0 · Kind

Broader concepts

◇ dimensionless quantities

Characterizes

● substance

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:t9-40.1

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	9-40.1
skosxl:prefLabel	"thermal diffusion ratio"@en
skosxl:altLabel	"k_T"@en
skos:definition	in a steady-state of a binary mixture in which thermal diffusion occurs, proportionality factor between gradient of the …
isq:hasUnit	1 (one)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-9

Related Entities

isq:QuantityShape isq:part-9 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry