Part 11: Characteristic Numbers·115 entries

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11-6.8

Atwood number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-6.8

https://metanorma.github.io/isq-smart/quantities/part-11/t11-6.8
urn:iso:std:iso:80000:-11:ed-2:en:item:11-6.8

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-6.8

IEC

urn:iec:std:iec:80000-11:2019:::item:11-6.8

Designations

ENAtwood number

FRnombre d'Atwood

Symbol

A t

Notation systems

Rendered

A t

AsciiMath

At

LaTeX

A t

Definition

scaled density difference of heavier and lighter fluids, expressed by

$A t = \frac{ρ_{1} - ρ_{2}}{ρ_{1} + ρ_{2}}$ ; where

$ρ_{1}$ :: is density of heavier fluid, and

$ρ_{2}$ :: is density of lighter fluid

différence de masse volumique mise à l'échelle entre un fluide lourd et un fluide léger, exprimée par:

$A t = \frac{ρ_{1} - ρ_{2}}{ρ_{1} + ρ_{2}}$ ; où

$ρ_{1}$ :: est la masse volumique du fluide lourd; et

$ρ_{2}$ :: est la masse volumique du fluide léger

Notes

The Atwood number is used in the study of hydrodynamic instabilities in density stratified flows.

Le nombre d'Atwood est utilisé dans l'étude des instabilités hydrodynamiques dans des écoulements avec une stratification de densité.

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:t11-6.8

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-6.8
skosxl:prefLabel	"Atwood number"@en
skosxl:altLabel	"At"@en
skos:definition	scaled density difference of heavier and lighter fluids, expressed by stem:[At = (rho_1 - rho_2)/(rho_1 + rho_2)]; wher…
skos:note	The Atwood number is used in the study of hydrodynamic instabilities in density stratified flows.
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