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Permanent Bedforms in a Theoretical Model of Wave-sea-bed Interactions : Volume 7, Issue 1/2 (30/11/-0001)

By Becker, J. M.

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Book Id: WPLBN0004019961
Format Type: PDF Article :
File Size: Pages 5
Reproduction Date: 2015

Title: Permanent Bedforms in a Theoretical Model of Wave-sea-bed Interactions : Volume 7, Issue 1/2 (30/11/-0001)  
Author: Becker, J. M.
Volume: Vol. 7, Issue 1/2
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Bercovici, D., & Becker, J. M. (-0001). Permanent Bedforms in a Theoretical Model of Wave-sea-bed Interactions : Volume 7, Issue 1/2 (30/11/-0001). Retrieved from http://www.worldebookfair.com/


Description
Description: Department of Geology and Geophysics, University of Hawaii at Manoa, Honolulu, HI, 96822, USA. The interaction between sea waves and a deformable sea-bed is studied with a simple two-layer model in which the upper-layer fluid is inviscid and the lower-layer fluid is bi-viscous to account for non-Newtonian behaviour of sand and sediments. The nonlinear response of the system to periodic forcing by an external surface pressure is determined. It is shown that a simple bi-viscous rheology allows small wavelength morphology in the lower layer to be generated from large wavelength surface waves in the upper inviscid layer, although the morphology is not permanent. For a bi-viscous rheology with a pressure-dependent yield stress (which accounts for the fact that sand yields less readily under loading than unloading), however, small wavelength and permanent features are formed in the seabed.

Summary
Permanent bedforms in a theoretical model of wave-sea-bed interactions

 

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