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

11-4.32

Stokes number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-4.32

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-4.32
urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.32

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.32

IEC

urn:iec:std:iec:80000-11:2019:::item:11-4.32

Designations

ENStokes number

FRnombre de Stokes

Symbol

S t k

Notation systems

Rendered

S t k

AsciiMath

Stk

LaTeX

S t k

Definition

quotient of friction and inertia forces for particles in a fluid or in a plasma, expressed by

$S t k t = t_{r} / t_{a}$ ; where

$t_{r}$ :: is relaxation time (ISO 80000-12: Condensed matter physics) of particles to achieve fluid's velocity due to friction (viscosity), and

$t_{a}$ :: is time (ISO 80000-3: Space and time) of fluid to alter its velocity under external influence

quotient de la force de frottement par la force d'inertie pour des particules dans un fluide ou dans un plasma, exprimé par:

$S t k t = t_{r} / t_{a}$ ; où

$t_{r}$ :: est le temps de relaxation (ISO 80000-12: Condensed matter physics) pour que les particules atteignent la vitesse du fluide en raison du frottement (viscosité); et

$t_{a}$ :: est le temps (ISO 80000-3: Space and time) pour que la vitesse du fluide change sous l'effet d'une influence extérieure

Notes

In most cases $t_{r} = l / v$ ; where $l$ is characteristic length, and $v$ is speed of fluid. The characteristic length can be the diameter of an obstacle or hole.

Dans la plupart des cas $t_{r} = l / v$ ; où $l$ est la longueur caractéristique et $v$ est la vitesse du fluide. La longueur caractéristique peut être le diamètre d'un obstacle ou d'un trou.

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:t11-4.32

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-4.32
skosxl:prefLabel	"Stokes number <time-related>"@en
skosxl:altLabel	"Stk"@en
skos:definition	quotient of friction and inertia forces for particles in a fluid or in a plasma, expressed by stem:[Stkt = t_"r"//t_"a"…
skos:note	In most cases stem:[t_"r"=l//v]; where stem:[l] is characteristic length, and stem:[v] is speed of fluid. The characteri…
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