Hydrostatic versus Nonhydrostatic Euler-Equation Modeling of Nonlinear Internal Waves
Publication: Journal of Engineering Mechanics
Volume 135, Issue 10
Abstract
Basin-scale internal waves are inherently nonhydrostatic; however, they are frequently resolved features in three-dimensional hydrostatic lake and coastal ocean models. Comparison of hydrostatic and nonhydrostatic formulations of the Centre for Water Research Estuary and Lake Computer Model provides insight into the similarities and differences between these representations of internal waves. Comparisons to prior laboratory experiments are used to demonstrate the expected wave evolution. The hydrostatic model cannot replicate basin-scale wave degeneration into a solitary wave train, whereas a nonhydrostatic model does represent the downscaling of energy. However, the hydrostatic model produces a nonlinear traveling borelike feature that has similarities to the mean evolution of the nonhydrostatic wave.
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Acknowledgments
This work was partially funded by the Office of Naval Research Young Investigator Award through Grant No. UNSPECIFIEDN00014-01-1-0574. The writers also appreciate the collaboration of Professor Jörg Imberger at the Center for Water Research, University of Western Australia in the use of CWR-ELCOM.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 135 • Issue 10 • October 2009
Pages: 1069 - 1080
Copyright
© 2009 ASCE.
History
Received: Mar 21, 2006
Accepted: May 7, 2009
Published online: Sep 15, 2009
Published in print: Oct 2009
Notes
Note. Associate Editor: Brett F. Sanders
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