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http://dx.doi.org/10.9765/KSCOE.2013.25.6.405

Sediment Transport Calculation Considering Cohesive Effects and Its Application to Wave-Induced Topographic Change  

Cho, Yong Hwan (Department of Civil Engineering, Nagoya University)
Nakamura, Tomoaki (Department of Civil Engineering, Nagoya University)
Mizutani, Norimi (Department of Civil Engineering, Nagoya University)
Lee, Kwang-Ho (Department of Energy Resources and Plant Engineering, Kwandong University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.25, no.6, 2013 , pp. 405-411 More about this Journal
Abstract
A sediment transport calculation considering cohesive force is proposed to deal with the transport phenomena of cohesive sediment. In the proposed calculation, each sand particle is assumed to be surrounded by a thin layer of mud. The critical Shields parameter and bed-load sediment transport rate are modified to include the cohesive force acting on the sand particle. The proposed calculation is incorporated into a two-way coupled fluid-structure-sediment interaction model, and applied to wave-induced topographic change of artificial shallows. Numerical results show that an increase in the content ratio of the mud, cohesive resistance force per unit surface area and water content cause increases in the critical Shields parameter and decreases in the bed-load sediment transport rate, reducing the topographic change of the shallow without changing its trend. This suggests that mixing mud in the pores of the sand particles can reduce the topographic change of shallows.
Keywords
numerical modeling; sediment transport; cohesive effects; shallows; mud; topographic change;
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