Part 11: Characteristic Numbers·115 entries

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11-6.18

absorption number

URNurn:iso:std:iso:80000:-11:ed-2:en:item:11-6.18

https://metanorma.github.io/isq-smart/quantities/part-11/t11-6.18
urn:iso:std:iso:80000:-11:ed-2:en:item:11-6.18

ISQ Identifiers

ISO

urn:iso:std:iso:80000:-11:ed-2:en:item:11-6.18

IEC

urn:iec:std:iec:80000-11:2019:::item:11-6.18

Designations

ENabsorption number

FRnombre d'absorption

Symbol

A b

Notation systems

Rendered

A b

AsciiMath

Ab

LaTeX

A b

Definition

relation between mass flow rate and surface area for gas absorption at wetted walls, expressed by

$A b = k \sqrt{\frac{l d}{D q_{V}}}$ ; where

$k$ :: is the mass transfer coefficient through the surface, $k = k' / ρ$ , where

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

$k'$ ::: is mass flux density through the surface, $k' = q_{m} / A$ , where

$q_{m}$ :::: is mass flow rate (ISO 80000-4: Mechanics), and

$A$ :::: is area (ISO 80000-3: Space and time),

$l$ :: is length (ISO 80000-3: Space and time) of wetted surface,

$d$ :: is thickness (ISO 80000-3: Space and time) of liquid film,

$D$ :: is diffusion coefficient (ISO 80000-9: Physical chemistry and molecular physics), and

$q_{V}$ :: is volume flow rate (ISO 80000-4: Mechanics) per wetted perimeter

relation entre le débit-masse et l'aire de la surface pour l'absorption d'un gaz au niveau de parois mouillées, exprimée par:

$A b = k \sqrt{\frac{l d}{D q_{V}}}$ ; où

$k$ :: est le coefficient de transfert de masse à travers la surface, $k = k \frac{'}{ρ}$ , où

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

$k'$ ::: est le débit-masse surfacique à travers la surface, $k' = \frac{q_{m}}{A}$ ; où

$q_{m}$ :::: est le débit-masse (ISO 80000-4: Mechanics); et

$A$ :::: est l'aire (ISO 80000-3: Space and time);

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

$d$ :: est l'épaisseur (ISO 80000-3: Space and time) du film liquide;

$D$ :: est le coefficient de diffusion (ISO 80000-9: Physical chemistry and molecular physics); et

$q_{V}$ :: est le débit-volume (ISO 80000-4: Mechanics) par périmètre mouillé

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:t11-6.18

Properties

isq:QuantityShape

Property	Value
rdf:type	isq:Quantity smart:TermEntry
dcterms:identifier	11-6.18
skosxl:prefLabel	"absorption number"@en
skosxl:altLabel	"Ab"@en
skos:definition	relation between mass flow rate and surface area for gas absorption at wetted walls, expressed by stem:[Ab = k sqrt((ld…
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