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Temporal Evolution of Scour at submerged Circular cylinders

Journal of Marine Science and Application 2021年第1期20卷 85-101页

作者： Abhijit Rout Arindam Sarkar Indian Institute of Technology Bhubaneswar ArgulJatniOdisha 752050India

Temporal evolutions of scour at submerged circular cylinders were *** visualization was carried out around the cylinders over plane,under developed and equilibrium scour *** analysis technique was used to formulate the equations for determining the diameter of the horseshoe vortex around the submerged cylinders,which is also verified from the vector diagrams drawn using the velocity *** scour process similar to live bed scour was noticed around the downstream *** diameter of the horseshoe vortex is found to depend on the diameter of respective cylinder,submergence ratio,spacing between the cylinders and skew *** formulation along with the dislodgement and transportation of a single sediment particle is further incorporated in the proposed model for determining the time variation of scour around the submerged *** is evident from the results that the upstream cylinder shelters the downstream cylinder and thereby reduces the scour at the downstream *** model is further extended to incorporate the effect of non-uniformity of the sediment particles on the time variation of scour *** results indicate significant reduction of scour depth of around 6%and 35%for upstream and downstream cylinders respectively due to the formation of the armor *** model is also compared with the local scour component of field data around cylindrical bridge piers to establish the differences in the scour process around a partially submerged cylinder and fully submerged tandem and skewed cylinders.

关键词： Scour Tandem Skewed submerged cylinder Sediment Time variation

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Numerical Study of Interactions between Regular Water Waves and a submerged Obstacle

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Advances in Manufacturing 1999年第1期3卷 30-35页

作者： Wan Decheng (Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University) Shanghai Institute of Applied Mathematics and Mechanics Shanghai University

The interaction between regular water waves and a submerged obstacle in a channel is studied numerically. The fluid viscosity is taken into account and the volume of fluid method is used to deal with the free surface. The incident regular waves are generated by use of numerical absorbing wave maker paddle. The present method can be used to predict the nonlinear deformations of the transmitted regular waves, and to simulate the vortex flow near the obstacle and the shear flows beneath the free surface.

关键词： periodic waves submerged cylinder viscous flows volume of fluid method

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