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

11-4.21

Ekman number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-4.21

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-4.21
urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.21

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.21

IEC

urn:iec:std:iec:80000-11:2019:::item:11-4.21

Designations

ENEkman number

FRnombre d'Ekman

Symbol

E k

Notation systems

Rendered

E k

AsciiMath

Ek

LaTeX

E k

Definition

quotient of viscous forces and Coriolis forces in the context of transfer of matter for the flow of a rotating fluid, expressed by

$E k = v / (2 l^{2} ω_{E} sin φ)$ ; where

$v$ :: is kinematic viscosity (ISO 80000-4: Mechanics),

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

$ω_{E}$ :: is angular frequency (ISO 80000-3: Space and time) of the Earth's rotation, and

$φ$ :: is angle of latitude

quotient des forces visqueuses par les forces de Coriolis dans le contexte d'un transfert de matière pour l'écoulement d'un fluide en rotation, exprimé par:

$E k = v / (2 l^{2} ω_{E} sin φ)$ ; où

$v$ :: est la viscosité cinématique (ISO 80000-4: Mechanics);

$l$ :: est la longueur caractéristique (ISO 80000-3: Space and time), l'échelle du phénomène;

$ω_{E}$ :: est la fréquence angulaire (ISO 80000-3: Space and time) de rotation de la Terre; et

$φ$ :: est l'angle de latitude

Notes

In plasma physics, the square root of this number is used.

The Ekman number is also given by

$E k = R o / R e$ ; where

$R o$ :: is the Rossby number (Rossby number), and

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

La racine carrée de ce nombre est utilisée en physique des plasmas.

Le nombre d'Ekman est également donné par:

$E k = R o / R e$ ; où

$R o$ :: est le nombre de Rossby (Rossby number); et

$R e$ :: est le nombre de Reynolds (Reynolds 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:t11-4.21

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-4.21
skosxl:prefLabel	"Ekman number"@en
skosxl:altLabel	"Ek"@en
skos:definition	quotient of viscous forces and Coriolis forces in the context of transfer of matter for the flow of a rotating fluid, ex…
skos:note	In plasma physics, the square root of this number is used. The Ekman number is also given by stem:[Ek = Ro//Re]; where…
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