FURI | Fall 2019

Dust Entrainment and Dust Devils

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In this study, dust entrainment and aerosol dynamics within the formation of dust devils are investigated numerically. A dust entrainment scheme based on local velocities is implemented in the canonical Rayleigh-Benard convection with a particle advection scheme to produce a framework to study dust devils. The model for dust emission based on local flow quantities predicts a more accurate uplift than the previous mean-shear models, which noticeably under-predict uplift. The developed models are useful for understanding the dynamics of dust devils and dust storms, which will help mitigate their detrimental effects to health and environment.

Student researcher

Hezekiah Villarin Grayer

Aerospace engineering

Hometown: Glendale, Arizona, United States

Graduation date: Spring 2020

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