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

11-7.7

Weissenberg number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-7.7

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-7.7
urn:iso:std:iso:80000:-11:ed-2:en:item:11-7.7

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-7.7

IEC

urn:iec:std:iec:80000-11:2019:::item:11-7.7

Designations

ENWeissenberg number

FRnombre de Weissenberg

Symbol

W i

Notation systems

Rendered

W i

AsciiMath

Wi

LaTeX

W i

Definition

product of time derivative of shear rate and relaxation time in viscoelastic flows, expressed by

$W i = \dot{γ} t_{r}$ ; where

$\dot{γ}$ :: is time derivative of shear strain (ISO 80000-4: Mechanics), and

$t_{r}$ :: is relaxation time (ISO 80000-12: Condensed matter physics)

produit de la dérivée dans le temps de la vitesse de cisaillement et du temps de relaxation dans des écoulements viscoélastiques, exprimé par:

$W i = \dot{γ} t_{r}$ ; où

$\dot{γ}$ :: est la dérivée dans le temps du glissement unitaire (ISO 80000-4: Mechanics); et

$t_{r}$ :: est le temps de relaxation (ISO 80000-12: Condensed matter physics)

Notes

The Weissenberg number represents the relative importance of viscous forces when compared to elastic forces.

The time derivative of shear strain is sometimes called the shear rate.

Le nombre de Weissenberg représente l'importance relative des forces visqueuses par rapport aux forces élastiques.

La dérivée dans le temps du glissement unitaire est parfois appelée vitesse de cisaillement.

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:t11-7.7

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-7.7
skosxl:prefLabel	"Weissenberg number"@en
skosxl:altLabel	"Wi"@en
skos:definition	product of time derivative of shear rate and relaxation time in viscoelastic flows, expressed by stem:[Wi = dot gamma t…
skos:note	The Weissenberg number represents the relative importance of viscous forces when compared to elastic forces. The time d…
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