# Flowability

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{{Short description|Physical property of a powder}}
'''Flowability''', also known as '''powder flow''' is a property that defines an ability of a powdered material to flow, related to [cohesion](/source/Cohesion_(chemistry)).<ref name="yad">{{cite web |author=Karolina Szulc, Andrzej Lenart |year=2009 |title=WŁAŚCIWOŚCI KOHEZYJNE WYBRANYCH PROSZKÓW SPOŻYWCZYCH |trans-title=Cohesive properties of chosen edible powders |url=https://yadda.icm.edu.pl/baztech/element/bwmeta1.element.baztech-article-BAR0-0045-0061/c/httpir_ptir_orgartykulypl111ir1112478pl.pdf |publisher=Warsaw University of Life Sciences |language=pl}}</ref>

Powder flowability depends on many traits:<ref name=yad/><ref>{{cite web |title=Badanie własności proszków |trans-title=Examining properties of powders |url=http://www.kmimp.agh.edu.pl/pliki/cz2.pdf |language=pl}}</ref>
* the shape and size of the powder particles due to [intermolecular force](/source/intermolecular_force),
* [porosity](/source/porosity)
* [electrostatic activity](/source/Electrostatics)
* [hygroscopy](/source/hygroscopy)
* [bulk density](/source/bulk_density)
* [angle of repose](/source/angle_of_repose)
* presence of [glidant](/source/glidant)s
* oxidation rate (of a metallic powder)
* humidity

[ISO](/source/International_Organization_for_Standardization) 4490:2018 norm (and its precedent, ISO 4490:2014) standardizes a method for determining the flow rate of metallic powders. It uses a normalized/calibrated [funnel](/source/funnel), named [Hall flowmeter](/source/Hall_flowmeter).<ref>{{Cite web |title=ISO 4490:2014 |url=https://www.iso.org/cms/render/live/en/sites/isoorg/contents/data/standard/06/51/65132.html |access-date=2022-11-21 |website=ISO |language=en}}</ref>

== See also ==
* [Fluid mechanics](/source/Fluid_mechanics)
* [Soil mechanics](/source/Soil_mechanics)
* [Cohesion (geology)](/source/Cohesion_(geology))
* [angle of repose](/source/angle_of_repose)

== References ==
{{Reflist}}

Category:Condensed matter physics
Category:Intermolecular forces
Category:Physical phenomena
Category:Mechanics
Category:Geotechnical engineering
Category:Fluid mechanics

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