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

11-7.4

Ohnesorge number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-7.4

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-7.4
urn:iso:std:iso:80000:-11:ed-2:en:item:11-7.4

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-7.4

IEC

urn:iec:std:iec:80000-11:2019:::item:11-7.4

Designations

ENOhnesorge number

FRnombre d'Ohnesorge

Symbol

O h

Notation systems

Rendered

O h

AsciiMath

Oh

LaTeX

O h

Definition

relation between viscous force and the square root of the product of inertia force and capillary force for atomization of liquids, expressed by

$O h = \frac{η}{\sqrt{γ ρ l}}$ ; where

$η$ :: is dynamic viscosity (ISO 80000-4: Mechanics),

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

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

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

relation entre la force visqueuse et la racine carrée du produit de la force d'inertie et de la force capillaire pour l'atomisation de liquides, exprimée par:

$O h = \frac{η}{\sqrt{γ ρ l}}$ ; où

$η$ :: est la viscosité dynamique (ISO 80000-4: Mechanics);

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

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

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

Notes

The Ohnesorge number is also given by

$O h = \sqrt{W e} / R e$ ; where

$W e$ :: is the Weber number (Weber number), and

$R e$ :: is the Reynolds number (Reynolds number).

See also Laplace number (Laplace number).

The characteristic length typically is the drop diameter.

Le nombre d'Ohnesorge est également donné par:

$O h = \sqrt{W e} / R e$ ; où

$W e$ :: est le nombre de Weber (Weber number); et

$R e$ :: est le nombre de Reynolds (Reynolds number).

Voir aussi le nombre de Laplace (Laplace number).

La longueur caractéristique est habituellement le diamètre d'une goutte.

Referenced by

Laplace 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:t11-7.4

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-7.4
skosxl:prefLabel	"Ohnesorge number"@en
skosxl:altLabel	"Oh"@en
skos:definition	relation between viscous force and the square root of the product of inertia force and capillary force for atomization o…
skos:note	The Ohnesorge number is also given by stem:[Oh = sqrt(We)//Re]; where stem:[We]:: is the Weber number (<<t11-4.5>>), a…
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