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4-24

dynamic viscosity, viscosity

URNurn:iso:std:iso:80000:-4:ed-2:en:item:4-24

https://metanorma.github.io/isq-smart/quantities/part-4/t4-24
urn:iso:std:iso:80000:-4:ed-2:en:item:4-24

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-4:ed-2:en:item:4-24

IEC

urn:iec:std:iec:80000-4:2019:::item:4-24

Designations

ENdynamic viscosity

FRviscosité dynamique

ENviscosity

FRviscosité

Symbol

η

Notation systems

Rendered

η

AsciiMath

eta

LaTeX

\eta

Definition

for laminar flows, proportionality constant between shear stress

$τ_{x z}$ (shear stress) in a fluid moving with a velocity $v_{x}$

(ISO 80000-3: Space and time) and gradient $d v_{x} / d z$ perpendicular to the plane of shear:

$τ_{x z} = η \frac{d v_{x}}{d z}$

pour des écoulements laminaires, constante de proportionnalité entre la contrainte tangentielle $τ_{x z}$ (shear stress) dans un fluide se déplaçant à une vitesse $v_{x}$ (ISO 80000-3: Space and time) et un gradient $d v_{x} / d z$ perpendiculaire au plan de glissement :

$τ_{x z} = η \frac{d v_{x}}{d z}$

Units

P a \cdot s

pascal second

View related quantities →

k g \cdot m^{- 1} \cdot s^{- 1}

kilogram per metre second

View related quantities →

Referenced by

kinematic viscosity

Concept HierarchyPendrill (2024)

L⁻¹ M T⁻¹L⁻¹ M T⁻¹ quantitiesLevel 0 · Kind

Broader concepts

◇ L⁻¹ M T⁻¹ 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:t4-24

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	4-24
skosxl:prefLabel	"dynamic viscosity"@en
skosxl:altLabel	"viscosity"@en"eta"@en
skos:definition	for laminar flows, proportionality constant between shear stress stem:[tau_(xz)] (<<t4-16.2>>) in a fluid moving with a …
isq:hasUnit	Pas (pascal second)kgm^(-1)*s^(-1) (kilogram per metre second)
isq:hasDimension	isq:Dimension
smart:hasBindingnessType	bindingness-type:normative
dcterms:isPartOf	isq:part-4

Related Entities

isq:QuantityShape isq:part-4 isq:Unit isq:Dimension isq:hasDimension smart:TermEntry