Part 11: Characteristic Numbers·115 entries

1 / 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

11-4.1

Reynolds number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-4.1

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-4.1
urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.1

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.1

IEC

urn:iec:std:iec:80000-11:2019:::item:11-4.1

Designations

ENReynolds number

FRnombre de Reynolds

Symbol

R e

Notation systems

Rendered

R e

AsciiMath

Re

LaTeX

R e

Definition

quotient of inertial forces and viscous forces in a fluid flow, expressed by

$R e = \frac{ρ v l}{η} = \frac{v l}{v}$ ; where

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

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

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

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

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

quotient des forces d'inertie par les forces visqueuses dans l'écoulement d'un fluide, exprimé par:

$R e = \frac{ρ v l}{η} = \frac{v l}{v}$ ; où

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

$v$ :: est la vitesse (ISO 80000-3: Space and time);

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

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

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

Notes

The value of the Reynolds number gives an estimate on the flow state: laminar flow or turbulent flow.

In rotating movement, the speed $v = ω l$ , where $l$ is the distance from the rotation axis and $ω$ is the angular velocity.

La valeur du nombre de Reynolds donne une estimation de l'état de l'écoulement: écoulement laminaire ou écoulement turbulent.

Dans un mouvement de rotation, la vitesse $v = ω l$ , où $l$ est la distance par rapport à l'axe de rotation et $ω$ est la vitesse angulaire.

Referenced by

Lagrange number Bodenstein number Ekman number Laplace number Galilei number Péclet number <heat transfer>Stanton number <heat transfer>Péclet number <mass transfer>Morton number Prandtl number Ohnesorge number Reynolds magnetic number Prandtl magnetic 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:t11-4.1

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-4.1
skosxl:prefLabel	"Reynolds number"@en
skosxl:altLabel	"Re"@en
skos:definition	quotient of inertial forces and viscous forces in a fluid flow, expressed by stem:[Re = (rho v l)/eta = (v l)/sf(ii(v))…
skos:note	The value of the Reynolds number gives an estimate on the flow state: laminar flow or turbulent flow. In rotating movem…
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