Establishment of Technique for Fast High-order-accurate Unstructured-mesh Fluid Solver on Exa-scale Computer

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13420
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Computational science
• Research Institution: Tohoku University (2016); Japan Aerospace EXploration Agency (2015)
• Principal Investigator: Nonomura Taku 東北大学, 工学研究科, 准教授 (60547967)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 非構造格子高次精度解析手法 / 圧縮性流体 / 乱流 / シミュレーション

Outline of Final Research Achievements

The study for the establishment of techniques on the fast high-order-accurate unstructured-mesh-based fluid solver is conducted. The following three techniques are established for the flux reconstruction scheme code of the compressible fluid analysis. 1) The consistent conservative metrics which maintain conservation law and preservation of freestream on moving and deforming grid is proposed and its performance is demonstrated. 2) The splitting form formulation for the kinetic energy conservation is proved and very high 16th order analysis is demonstrated to be stabilized. 3) Cache and register tuning is conducted and the memory access is quickened and twice faster computation speed is realized. Based on the items above, the basic techniques for the fast high-order-accurate unstructured-mesh-based fluid solver are developed.

Free Research Field

流体力学，実験流体力学，数値流体力学，空力音響