| タイトル | A Finite-Element Approach for Modeling Inviscid and Viscous Compressible Flows using Prismatic Grids |
| 本文（外部サイト） | http://hdl.handle.net/2060/20010074722 |
| 著者（英） | Hefez, M.; Pandya, S. A. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 2000-06-12 |
| 言語 | eng |
| 内容記述 | The Galerkin finite-element method is used to solve the Euler and Navier-Stokes equations on prismatic meshes. It is shown that the prismatic grid is advantageous for correctly and efficiently capturing the boundary layers in high Reynolds number flows. It can be captured accurately because of the ability to cluster grid points normal to the body. The efficiency derives from the implicit treatment of the normal direction. To treat the normal direction implicitly, a semi-implicit Runge-Kutta time stepping scheme is developed. The semi-implicit algorithm is validated on simple geometries for inviscid and viscous flows and its convergence history is compared to that of the explicit Runge-Kutta scheme. The semi-implicit scheme is shown to be a factor of 3 to 4 faster in terms of CPU time to convergence. |
| NASA分類 | Numerical Analysis |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/225958 |
