DRANSに関する研究(乱流の予測とモデリング(3),一般講演)

概要

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The recent rapid growth of computational technologies is giving us higher expectation that LES would be a next representative CFD method. However, LES still have some difficulties to be employed in the industrial applications, one of which calls for the quick-responding CFD method. Therefore, in order to acquire a cost-effective property in the unsteady turbulent flow computation, making the use of the advantage of conventional RANS would be one of the solutions for the numerical difficulties within LES. In this study, we propose Direct/Reynolds-Averaged hybrid Numerical Simulation (DRANS) to achieve reasonable unsteady flow simulation, with Reynolds stress model (RSM) handling the stress anisotropy, which can also be used as a three-dimensional resolution sensor in a posteriori stage. Then, the computations of flow over the backward-facing step are carried out to investigate the possibility of the proposed DRANS strategy. The results show the encouraging feature of present method.
日本流体力学会の論文
2007-08-06