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

11-4.8

Strouhal number, Thomson number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-4.8

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-4.8
urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.8

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.8

IEC

urn:iec:std:iec:80000-11:2019:::item:11-4.8

Designations

ENStrouhal number

FRnombre de Strouhal

ENThomson number

FRnombre de Thomson

Symbol

S r

S h

Notation systems

Rendered

S r

Rendered

S h

AsciiMath

Sr

AsciiMath

Sh

LaTeX

S r

LaTeX

S h

Definition

relation between a characteristic frequency and a characteristic speed for unsteady flow with periodic behaviour, expressed by

$S r = f l / v$ ; where

$f$ :: is frequency (ISO 80000-3: Space and time) of vortex shedding,

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

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

relation entre une fréquence caractéristique et une vitesse caractéristique dans le contexte d'un écoulement instable ayant un comportement périodique, exprimée par:

$S r = f l / v$ ; où

$f$ :: est la fréquence (ISO 80000-3: Space and time) des décollements de tourbillons;

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

$v$ :: est la vitesse (ISO 80000-3: Space and time) d'écoulement

Notes

The characteristic length, $l$ , can be the diameter of an obstacle in the flow which can cause vortex shedding, or the length of it.

La longueur caractéristique, $l$ , peut être le diamètre d'un obstacle dans l'écoulement susceptible de provoquer des décollements de tourbillons, ou la longueur de celui-ci.

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:t11-4.8

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-4.8
skosxl:prefLabel	"Strouhal number"@en
skosxl:altLabel	"Thomson number"@en"Sr"@en"Sh"@en
skos:definition	relation between a characteristic frequency and a characteristic speed for unsteady flow with periodic behaviour, expres…
skos:note	The characteristic length, stem:[l], can be the diameter of an obstacle in the flow which can cause vortex shedding, or …
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