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Permanent link (DOI): https://doi.org/10.7939/R3HW3M

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The Influence of Dust Devils on Martian Water Vapour Transport Open Access

Descriptions

Other title
Subject/Keyword
Vortex generators
Mars (Planet) -- Water
Dust devils
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Chen, Kuan-Chih
Supervisor and department
Carlos F. Lange (Mechanical Engineering)
Examining committee member and department
Mark Ackerman (Mechanical Engineering)
John D. Wilson (Earth and Atmospheric Seciences)
Morris Flynn (Mechanical Engineering)
Department
Department of Mechanical Engineering
Specialization

Date accepted
2011-02-04T20:29:56Z
Graduation date
2011-06
Degree
Master of Science
Degree level
Master's
Abstract
A laboratory vortex generator was designed and fabricated to reproduce the behavior of this complex swirling flow. The vortex generator design was based on the results of computational fluid dynamics to optimize the performance, to reduce the cost, and to ensure kinematic similarity with atmospheric vortices. Stereo particle image velocimetry was used to investigate the flow velocity field generated by the instrument. In addition, laboratory scaled water vapour transport experiments were conducted, using a series of 128 solid-state humidity/temperature sensors. The results were used for successful validation of the numerical simulations. The study confirmed the expected effect that dust devils did indeed enhance mass transport. It was concluded that the radial Reynolds number was the most relevant scaling factor for this phenomenon. A numerical model with Martian conditions was then calculated to estimate the local water vapour transport rate from the Martian regolith with the presence of dust devil-like flows.
Language
English
DOI
doi:10.7939/R3HW3M
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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