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Engineering  |  FURI

Hezekiah Villarin Grayer

Hometown: Glendale, Arizona, United States | Graduation Date: Spring 2020
Aerospace engineering

Particle Entrainment in Convection Scenarios

Mentor:
Research Theme: Sustainability
FURI: Spring 2020

In this study, dust entrainment and aerosol dynamics within the formation of dust devils are investigated numerically. Particles lying on the boundary are resolved in a periodic Rayleigh-Benard convection to investigate details of entrainment in scenarios analogous to the atmosphere. The details provided by the high-fidelity platform are powerful tools develop models of dust emission in the presence of no mean wind. A dependence of entrainment is found and documented for particle density, size along with the strength of stratification. 

Other Projects

Dust Entrainment and Dust Devils

Mentor:
Research Theme: Sustainability
FURI: Fall 2019

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.

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