An Investigation of Grid Resolution on Hypersonic Viscous Flow Simulation | |
Sun QH(孙泉华); Zhu HY(朱辉玉); Su TF(苏腾飞) | |
2014-05 | |
会议名称 | 1st International High-Speed Flow Conference |
会议日期 | May 13-14, 2014 |
会议地点 | Beijing |
关键词 | hypersonic viscous flow grid resolution CFD truncated error |
中文摘要 | The effects of grid resolution on hypersonic viscous flow simulations are investigated in detail. Previous studies have shown that grid plays an important role on the aerothermodynamic predictions for a hypersonic vehicle. We investigate flows over simplified geometry to analyze the behavior of grid resolution when the flow is solved using the Navier-Stokes equations. It shows that grid independent solutions can be achieved with fine meshes where the surface-based cell Reynolds number is in the order of 10. The reason for fine meshes is analyzed using wall functions derived using the boundary layer approximation. It is found that the truncated error of numerical schemes is increased dramatically when the flow approaches the surface, which explains the fact that near-surface cells should be much smaller than faraway cells to maintain the numerical error at a low level. |
学科主题 | 流体力学 |
语种 | 英语 |
内容类型 | 会议论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/49424] |
专题 | 力学研究所_高温气体动力学国家重点实验室 |
推荐引用方式 GB/T 7714 | Sun QH,Zhu HY,Su TF. An Investigation of Grid Resolution on Hypersonic Viscous Flow Simulation[C]. 见:1st International High-Speed Flow Conference. Beijing. May 13-14, 2014. |
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