Degree Type
Thesis
Date of Award
2009
Degree Name
Master of Science
Department
Geological and Atmospheric Sciences
First Advisor
William A. Gallus
Abstract
Hurricanes and tornadoes contain the most destructive and life threatening winds on the planet. Combined, they are responsible for approximately $11 billion in damage in the U.S. annually. To compose a set of effective mitigation techniques, a comprehensive understanding of hurricane and tornado winds is needed. However, our understanding of these winds in the lowest 30 meters AGL, particularly their interaction with complex terrain, is lacking.
This thesis includes two studies that address this issue. In the first study, a representative wind profile extracted from WRF simulations of hurricanes is used to initialize CFD modeled flow interaction with built structures using Fluent. The magnitude of structurally-induced modifications to the wind profile is presented. In the second study, recent tornado pressure and wind measurements are compared to laboratory and numerical simulations of tornado-like vortices. In addition, a comparative range of minimum pressures from a wide variety of tornadoes with different size and intensities is presented.
Copyright Owner
Christopher D. Karstens
Copyright Date
2009
Language
en
Date Available
2012-04-30
File Format
application/pdf
File Size
114 pages
Recommended Citation
Karstens, Christopher D., "Improved understanding of near-ground winds in hurricanes and tornadoes" (2009). Graduate Theses and Dissertations. 10893.
https://lib.dr.iastate.edu/etd/10893
