Numerical simulations of vortical free-surface flows are prone to developing spurious high-frequency dispersive waves unless the flow field is given sufficient time to adjust. At low Froude numbers, the high-frequency waves obscure the true hydrostatic balance of the free-surface elevation with the component of the pressure that is induced by the vortical portion of the flow. The high-frequency waves must be eliminated for remote sensing applications because otherwise the roughening of the free surface and the predicted radar backscatter will be incorrect. A procedure is developed for reducing the initial impulse of the pressure and the subsequent generation of high-frequency waves. Numerical simulations of whirls illustrate the effectiveness of the procedure. The pressure field of the whirls forms dimples on the free surface.
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March 1994
Research Papers
The Initialization of Vortical Free-Surface Flows
D. G. Dommermuth
D. G. Dommermuth
Naval Hydrodynamics Division, Science Applications International Corporation, 10260 Campus Point Drive, MS 34, San Diego, CA 92121
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D. G. Dommermuth
Naval Hydrodynamics Division, Science Applications International Corporation, 10260 Campus Point Drive, MS 34, San Diego, CA 92121
J. Fluids Eng. Mar 1994, 116(1): 95-102 (8 pages)
Published Online: March 1, 1994
Article history
Received:
June 30, 1992
Revised:
February 23, 1993
Online:
May 23, 2008
Citation
Dommermuth, D. G. (March 1, 1994). "The Initialization of Vortical Free-Surface Flows." ASME. J. Fluids Eng. March 1994; 116(1): 95–102. https://doi.org/10.1115/1.2910249
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