Development of a Many-Block Solver for Geometrically Flexible and High-order Accurate CFD
松山, 新吾Matsuyama, Shingo
宇宙航空研究開発機構特別資料: 第49回流体力学講演会/第35回航空宇宙数値シミュレーション技術シンポジウム論文集=JAXA Special Publication: Proceedings of the 49th Fluid Dynamics Conference / the 35th Aerospace Numerical Simulation Symposium
158 , 2017-12-27 , 宇宙航空研究開発機構(JAXA) , Japan Aerospace Exploration Agency (JAXA)
A many-block solver is developed for geometrically flexible and high-order accurate CFD method. To achieve an N-th order spatial accurate scheme in the many-block solver, hexahedral parent cells are sub-divided into structured N to the third power cells. A finite volume method in a similar manner with structured solver is applied to solve the governing equations in the sub-divided cells. High-order spatial accuracy is achieved by interpolating the primitive variables at the cell interfaces of sub-divided cells with a fifth-order polynomial. The developed fifth-order many-block solver is tested for the Taylor-Green vortex problem at Re = 1600. The time evolutions of kinetic energy, kinetic energy dissipation rate, enstrophy field, and vorticity contours obtained by the many-block solver on a fine mesh with (100×5)(exp 3) cells are in excellent agreement with a reference solution obtained using a pseudo-spectral method. The computational speed and cost of many-block solver are evaluated on the JAXA supercomputer system. The many-block solver achieves a computational speed at 2.2 Tflops on 63 nodes (2016 cores) which is approximately 3.3 percent of the system theoretical peak performance. The computational time and memory usage of many-block solver are approximately 1.4 and 3.3 times higher, respectively, than those of a conventional structured multi-block solver.
会議情報: 第49回流体力学講演会/第35回航空宇宙数値シミュレーション技術シンポジウム (2017年6月28日-30日. 国立オリンピック記念青少年総合センター), 渋谷区, 東京
Meeting Information: 49th Fluid Dynamics Conference /the 35th Aerospace Numerical Simulation Symposium (June 28-30, 2017. National Olympics Memorial Youth Center), Shibuya-ku, Tokyo, Japan
Physical characteristics: Original contains color illustrations