Sphericity,a measure of how much a particle’s shape deviates from spherical,is useful as a shape factorwhen characterizing particulate materials.However,particle surface areas,required when determiningthe sphericity,...Sphericity,a measure of how much a particle’s shape deviates from spherical,is useful as a shape factorwhen characterizing particulate materials.However,particle surface areas,required when determiningthe sphericity,are very difficult to measure.As a result,the circularity,derivable from microscopic views,is often measured instead and assumed to be equal to the sphericity.This paper shows that the twoquantities are generally not equal for simple non-spherical shapes and provides advice on improving theestimation of sphericity from circularity.展开更多
基金The authors acknowledge the financial support of the Natural Science and Engineering Research Council of Canada(NSERC)via their CREATE and Discovery Grant programs.
文摘Sphericity,a measure of how much a particle’s shape deviates from spherical,is useful as a shape factorwhen characterizing particulate materials.However,particle surface areas,required when determiningthe sphericity,are very difficult to measure.As a result,the circularity,derivable from microscopic views,is often measured instead and assumed to be equal to the sphericity.This paper shows that the twoquantities are generally not equal for simple non-spherical shapes and provides advice on improving theestimation of sphericity from circularity.
