Part 11: Characteristic Numbers·115 entries

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11-5.16

Graetz number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-5.16

https://metanorma.github.io/isq-smart/quantities/part-11/t11-5.16
urn:iso:std:iso:80000:-11:ed-2:en:item:11-5.16

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-5.16

IEC

urn:iec:std:iec:80000-11:2019:::item:11-5.16

Designations

ENGraetz number

FRnombre de Graetz

Symbol

G z

Notation systems

Rendered

G z

AsciiMath

Gz

LaTeX

G z

Definition

relation between heat transferred by convection and heat transferred by conduction in a laminar flow in a pipe, expressed by

$G z = \frac{v d^{2}}{α l}$ ; where

$v$ :: is speed (ISO 80000-3: Space and time) of the fluid, +

$d$ :: is diameter (ISO 80000-3: Space and time) of the pipe, +

$α$ :: is thermal diffusivity (ISO 80000-5: Thermodynamics) of the fluid, and +

$l$ :: is length (ISO 80000-3: Space and time) of the pipe

relation entre la chaleur transférée par convection et la chaleur transférée par conduction dans le contexte d'un écoulement laminaire dans un tube, exprimée par:

$G z = \frac{v d^{2}}{α l}$ ; où

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

$d$ :: est le diamètre (ISO 80000-3: Space and time) du tube;

$α$ :: est la diffusivité thermique (ISO 80000-5: Thermodynamics) du fluide; et

$l$ :: est la longueur (ISO 80000-3: Space and time) du tube

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:t11-5.16

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-5.16
skosxl:prefLabel	"Graetz number <heat transfer>"@en
skosxl:altLabel	"Gz"@en
skos:definition	relation between heat transferred by convection and heat transferred by conduction in a laminar flow in a pipe, expresse…
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