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Computational simulation of the atmospheric boundary layer using sub-optimal grid resolution
McKenna, Matthew
McKenna, Matthew
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2018-05
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Electronic dissertation
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Electronic dissertations
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Abstract
This study explores simulation of turbulent atmospheric boundary layer (ABL) flow
fields using reduced mesh resolution as a means for reducing time and computational requirements. A full resolution simulation is performed using previously developed flow fields,
within OpenFOAM, in an effort to reproduce the statistical results of the original study. The
reduced resolution simulation is run on a personal computer (PC) and the results are compared to the full resolution simulation as well as the original study. As previously observed,
the sub-grid scale (SGS) model produces inaccurate results near the ground and a large
z-component of the streamwise velocity gradient still exists at the top boundary. There is
an exacerbation of these issues within the reduced resolution simulation, but the increase in
variance and deviation of the streamwise velocity gradient from the log-law are aspects which
particularly demonstrate the inadequacies of simulations with sub-optimal grid resolutions.
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Thesis (M.S.)-- Wichita State University, College of Engineering, Dept. of Mechanical Engineering
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Wichita State University
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Copyright 2018 by Matthew McKenna
All Rights Reserved