Part 11: Characteristic Numbers·115 entries

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Section 11-710 entries

11-7.1Prandtl number 11-7.2Schmidt number, DEPRECATED: Colburn number 11-7.3Lewis number 11-7.4Ohnesorge number 11-7.5Cauchy number, aeroelasticity parameter 11-7.6Hooke number 11-7.7Weissenberg number 11-7.8Deborah number 11-7.9Lorentz number 11-7.10compressibility number

11-7.3

Lewis number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-7.3

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-7.3
urn:iso:std:iso:80000:-11:ed-2:en:item:11-7.3

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-7.3

IEC

urn:iec:std:iec:80000-11:2019:::item:11-7.3

Designations

ENLewis number

FRnombre de Lewis

Symbol

L e

Notation systems

Rendered

L e

AsciiMath

Le

LaTeX

L e

Definition

quotient of thermal diffusivity and diffusion coefficient for heat transfer in a fluid, expressed by

$L e = a / D$ ; where

$a$ :: is thermal diffusivity (ISO 80000-5: Thermodynamics), and

$D$ :: is diffusion coefficient (ISO 80000-9: Physical chemistry and molecular physics)

quotient de la diffusivité thermique par le coefficient de diffusion pour le transfert de chaleur dans un fluide, exprimé par:

$L e = a / D$ ; où

$a$ :: est la diffusivité thermique (ISO 80000-5: Thermodynamics); et

$D$ :: est le coefficient de diffusion (ISO 80000-9: Physical chemistry and molecular physics)

Notes

The Lewis number is also given by

$L e = S c / P r$ ; where

$S c$ :: is the Schmidt number (Schmidt number), and

$P r$ :: is the Prandtl number (Prandtl number).

Compare with Péclet number <heat transfer>.

The Lewis number is sometimes defined as reciprocal of this quantity.

Le nombre de Lewis est également donné par:

$L e = S c / P r$ ; où

$S c$ :: est le nombre de Schmidt (Schmidt number); et

$P r$ :: est le nombre de Prandtl (Prandtl number).

Comparer avec Péclet number <heat transfer>.

Le nombre de Lewis est parfois défini comme l'inverse de cette grandeur.

Referenced by

Fourier number <mass transfer>Péclet number <mass transfer>

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:t11-7.3

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-7.3
skosxl:prefLabel	"Lewis number"@en
skosxl:altLabel	"Le"@en
skos:definition	quotient of thermal diffusivity and diffusion coefficient for heat transfer in a fluid, expressed by stem:[Le = a//D]; …
skos:note	The Lewis number is also given by stem:[Le = Sc//Pr]; where stem:[Sc]:: is the Schmidt number (<<t11-7.2>>), and stem:…
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