E-334 横列砂丘形成に関する数値的研究

概要

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Three-dimensional flow above the sand dunes have been studied numerically by using Large-Eddy Simulation (LES) method. In the flow direction and span direction cyclic boundary conditions are imposed for velocity and pressure. The formation of the transverse dunes which are formed with unidirectional wind have been investigated. The numerical method employed in this study can be divided into three parts (i) calculation of the air flow above the sand dune using standard MAC method with a generalized coordinate system; (ii) estimation of the sand transfer caused by the flow through the friction; (iii) determination of the shape of the ground. Since the computational area has been changed due to step (iii), these procedures have to be repeated for the next time step. We also discuss the genesis of the transverse dunes formation formed by different wind strength and different sand supply.
日本流体力学会の論文
2003-07-28