Part 11: Characteristic Numbers·115 entries

34 / 115

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

11-4.34

Stokes number , power coefficient

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-4.34

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-4.34
urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.34

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.34

IEC

urn:iec:std:iec:80000-11:2019:::item:11-4.34

Designations

ENStokes number

FRnombre de Stokes

ENpower coefficient

FRcoefficient de puissance

Symbol

S t k_{2}

Notation systems

Rendered

S t k_{2}

AsciiMath

Stk_2

LaTeX

S t k_{2}

Definition

Stokes number for calibration of rotameters metering vertical flows of fluids by means of a floating body, expressed by

$S t k_{2} = \frac{r^{3} g m ρ}{η^{2}} \frac{(ρ_{b} - ρ)}{ρ_{b}} = \frac{r^{3} g m}{v^{2}} (\frac{1}{ρ} - \frac{1}{ρ_{b}})$ ; where

$r$ :: is ratio of pipe and float radii,

$g$ :: is acceleration of free fall (ISO 80000-3: Space and time),

$m$ :: is mass (ISO 80000-4: Mechanics) of the body,

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

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

$ρ_{b}$ :: is mass density (ISO 80000-4: Mechanics) of the body, and

$v$ :: is kinematic viscosity (ISO 80000-4: Mechanics) of the fluid

nombre de Stokes pour l'étalonnage de rotamètres mesurant des écoulements verticaux de fluides au moyen d'un corps flottant, exprimé par:

$S t k_{2} = \frac{r^{3} g m ρ}{η^{2}} \frac{(ρ_{b} - ρ)}{ρ_{b}} = \frac{r^{3} g m}{v^{2}} (\frac{1}{ρ} - \frac{1}{ρ_{b}})$ ; où

$r$ :: est le rapport du rayon du tube au rayon du flotteur;

$g$ :: est l'accélération due à la pesanteur (ISO 80000-3: Space and time);

$m$ :: est la masse (ISO 80000-4: Mechanics) du corps;

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

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

$ρ_{b}$ :: est la masse volumique (ISO 80000-4: Mechanics) du corps; et

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

Notes

In general use, this value is multiplied by $1.042$ .

See also the Archimedes number (Archimedes number).

En général, lorsqu'elle est utilisée, cette valeur est multipliée par $1.042$ .

Voir aussi le nombre d'Archimède (Archimedes number).

Referenced by

Archimedes 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:t11-4.34

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-4.34
skosxl:prefLabel	"Stokes number <rotameter>"@en
skosxl:altLabel	"power coefficient <rotameter>"@en"Stk_2"@en
skos:definition	Stokes number for calibration of rotameters metering vertical flows of fluids by means of a floating body, expressed by …
skos:note	In general use, this value is multiplied by stem:[1.042]. See also the Archimedes number (<<t11-6.12>>).
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