Research Article
Nov 1981
Bottom Smoothing to Prevent Numerical Instability
Publication: Journal of the Waterway, Port, Coastal and Ocean Division
Volume 107, Issue 4
Abstract
Numerical simulation of sediment transport and the changes in plan form of the shoreline near coastal structures may produce results where the bottom slope exceeds the maximum slope which would be expected to occur on the real (prototype) shoreline. This may cause an instability in the numerical solution and prevent an accurate simulation of the transport processes. A numerical subroutine has been developed to redistribute the sediment at points where the numerically produced bottom slope exceeds the maximum expected slope. This subroutine has no dependence on time. The smoothing is accomplished numerically after the completion of one or more iterations of time-dependent, numerical simulation of physical processes, e.g., sediment transport associated with wave action or currents. It should be noted that the smoothing subroutine will smooth any input data to reach a maximum slope between points, even random numbers. This subroutine should not be used as a substitute for good simulation of the physical processes, but may be used to smooth errors resulting from the inexact nature of numerical modeling.
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Information
Published In
Journal of the Waterway, Port, Coastal and Ocean Division
Volume 107 • Issue 4 • November 1981
Pages: 245 - 250
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: Nov 1981
Published online: Feb 12, 2021
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Authors
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Fred E. Camfield, M.ASCE
Hydr. Engr., U.S. Army Coastal Engrg. Research Center, Kingman Bldg., Ft. Belvoir, Va. 22060
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.