滑面乱流を前提とする河床変動のLESシミュレーション(移動床(2),一般講演)

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概要

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• Large-Eddy-Simulation (LES) is combined with the Immersed-Boundary-Method (IBM) to study bedform initiation and development by turbulent flows over erodible beds under hydraulically smooth conditions. The LES and IBM model was first validated with test cases of bed shear stress distributions and mean flow fields over fixed sinusoidal bed surface in open channel flows. The model was then incorporated with two other modules for sediment transport and for bed surface evolution to conduct test cases of sand wave evolution from flat beds in various flow and sediment conditions. Fundamental phenomena, such as formation of the first sand waves, ripple trains, and equilibrium bedforms, have been successfully reproduced.

• 日本流体力学会の論文
• 2008-09-04

著者

• Wells John

  立命館大

• Nguyen Quoc

  立命館大

関連論文

• SENSITIVITY OF PIV/INTERFACE GRADIOMETRY TO ESTIMATED WALL POSITION
• 滑面乱流を前提とする河床変動のLESシミュレーション(移動床(2),一般講演)

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