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

11-4.27

Laval number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-4.27

Download RDF.jsonld .ttl

https://metanorma.github.io/isq-smart/quantities/part-11/t11-4.27
urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.27

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-4.27

IEC

urn:iec:std:iec:80000-11:2019:::item:11-4.27

Designations

ENLaval number

FRnombre de Laval

Symbol

L a

Notation systems

Rendered

L a

AsciiMath

La

LaTeX

L a

Definition

quotient of speed and the (critical) sound speed at the throat of a nozzle, expressed by

$L a = v / \sqrt{(R_{s} T 2 γ) / (γ + 1)}$ ; where

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

$R_{s} = \frac{R}{M}$ :: is specific gas constant, where

$R$ ::: is molar gas constant (ISO 80000-9: Physical chemistry and molecular physics), and

$M$ ::: is molar mass (ISO 80000-9: Physical chemistry and molecular physics),

$T$ :: is thermodynamic temperature (ISO 80000-5: Thermodynamics), and

$γ$ :: is ratio of the specific heat capacities (ISO 80000-5: Thermodynamics)

quotient de la vitesse par la vitesse (critique) du son dans le col d'une tuyère, exprimé par:

$L a = v / \sqrt{(R_{s} T 2 γ) / (γ + 1)}$ ; où

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

$R_{s} = \frac{R}{M}$ :: est la constante massique du gaz; où

$R$ ::: est la constante molaire du gaz (ISO 80000-9: Physical chemistry and molecular physics); et

$M$ ::: est la masse molaire (ISO 80000-9: Physical chemistry and molecular physics);

$T$ :: est la température thermodynamique (ISO 80000-5: Thermodynamics); et

$γ$ :: est le rapport des capacités thermiques massiques (ISO 80000-5: Thermodynamics)

Notes

The Laval number is a specific kind of Mach number (Mach number).

Le nombre de Laval est un type spécifique de nombre de Mach (Mach 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:t11-4.27

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-4.27
skosxl:prefLabel	"Laval number"@en
skosxl:altLabel	"La"@en
skos:definition	quotient of speed and the (critical) sound speed at the throat of a nozzle, expressed by stem:[La = v // sqrt((R_"s"T 2…
skos:note	The Laval number is a specific kind of Mach number (<<t11-4.6>>).
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