{{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.<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, * porosity * electrostatic activity * hygroscopy * bulk density * angle of repose * presence of glidants * oxidation rate (of a metallic powder) * humidity
ISO 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, named 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 * Soil mechanics * Cohesion (geology) * angle of repose
== References == {{Reflist}}
Category:Condensed matter physics Category:Intermolecular forces Category:Physical phenomena Category:Mechanics Category:Geotechnical engineering Category:Fluid mechanics