Part 11: Characteristic Numbers·115 entries

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Section 11-442 entries

11-4.1Reynolds number 11-4.2Euler number 11-4.3Froude number 11-4.4Grashof number 11-4.5Weber number 11-4.6Mach number 11-4.7Knudsen number 11-4.8Strouhal number, Thomson number 11-4.9drag coefficient 11-4.10Bagnold number 11-4.11Bagnold number <solid particles>11-4.12lift coefficient 11-4.13thrust coefficient 11-4.14Dean number 11-4.15Bejan number 11-4.16Lagrange number 11-4.17Bingham number, plasticity number 11-4.18Hedström number 11-4.19Bodenstein number 11-4.20Rossby number, Kiebel number 11-4.21Ekman number 11-4.22elasticity number 11-4.23Darcy friction factor, Moody friction factor 11-4.24Fanning number 11-4.25Goertler number, Goertler parameter 11-4.26Hagen number 11-4.27Laval number 11-4.28Poiseuille number 11-4.29power number 11-4.30Richardson number 11-4.31Reech number 11-4.32Stokes number <time-related>11-4.33Stokes number <vibrating particles>11-4.34Stokes number <rotameter>, power coefficient <rotameter>11-4.35Stokes number <gravity>11-4.36Stokes number <drag>11-4.37Laplace number, Suratman number 11-4.38Blake number 11-4.39Sommerfeld number 11-4.40Taylor number <momentum transfer>11-4.41Galilei number 11-4.42Womersley number

11-4.5

Weber number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-4.5

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-4.5
urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.5

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.5

IEC

urn:iec:std:iec:80000-11:2019:::item:11-4.5

Designations

ENWeber number

FRnombre de Weber

Symbol

W e

Notation systems

Rendered

W e

AsciiMath

We

LaTeX

W e

Definition

relation between inertial forces and capillary forces due to surface tension at the interface between two different fluids, expressed by

$W e = ρ v^{2} l / γ$ ; where

$ρ$ :: is mass density (ISO 80000-4: Mechanics),

$v$ :: is speed (ISO 80000-3: Space and time),

$l$ :: is characteristic length (ISO 80000-3: Space and time), and

$γ$ :: is surface tension (ISO 80000-4: Mechanics)

relation entre les forces d'inertie et les forces capillaires due à la tension superficielle au niveau de l'interface entre deux fluides différents, exprimée par:

$W e = ρ v^{2} l / γ$ ; où

$ρ$ :: est la masse volumique (ISO 80000-4: Mechanics);

$v$ :: est la vitesse (ISO 80000-3: Space and time);

$l$ :: est la longueur caractéristique (ISO 80000-3: Space and time); et

$γ$ :: est la tension superficielle (ISO 80000-4: Mechanics)

Notes

The fluids can be gases or liquids.

The different fluids often are drops moving in a gas or bubbles in a liquid.

The characteristic length is commonly the diameter of bubbles or drops.

The square root of the Weber number is called Rayleigh number.

Sometimes the square root of the Weber number as defined here is called the Weber number. That definition is deprecated.

Interfaces only exist between two fluids which are not miscible.

Les fluides peuvent être des gaz ou des liquides.

Les différents fluides sont souvent des gouttes se déplaçant dans un gaz ou des bulles dans un liquide.

La longueur caractéristique est généralement le diamètre des bulles ou des gouttes.

La racine carrée du nombre de Weber est appelée nombre de Rayleigh.

Parfois, la racine carrée du nombre de Weber défini ici est appelée nombre de Weber. Cette définition est déconseillée.

Des interfaces existent uniquement entre deux fluides qui ne sont pas miscibles.

Referenced by

Laplace number Morton number Bond number Ohnesorge number

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:t11-4.5

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-4.5
skosxl:prefLabel	"Weber number"@en
skosxl:altLabel	"We"@en
skos:definition	relation between inertial forces and capillary forces due to surface tension at the interface between two different flui…
skos:note	The fluids can be gases or liquids. The different fluids often are drops moving in a gas or bubbles in a liquid. The c…
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