Algebraic method of generating moving grid with local refinement applied to nonlinear-wave problems

Tzu Chiang Li, Chii-Jau Tang

研究成果: Article同行評審

摘要

The article discussed the algebraic moving-grid generation method with stream-function flow model to study the nonlinear-wave problems involving largely-displaced boundary. By solving the Laplace equation transformed in a transient boundary-fitted grid system we were able to assess the local grid-refinement technique on two problems: one for a solitary wave propagating along a long channel of uniform water depth, and the other for the free-surface flow disturbed by a vertical plate accelerated horizontally in a resting water channel. We first validated the model by comparing the calculated results in various uniform grids with the small-time perturbation solution and other investigations, and then quantified the computational efficiency and solution accuracy of the result using the grid-refinement technique in numerical model. In our study, it showed that the numerical work using the locally-refined grids saves up to 50-60% of CPU time, as compared with those using uniformly fine grids at the comparable accuracy.

原文English
頁(從 - 到)7-14
頁數8
期刊Hangkong Taikong ji Minhang Xuekan/Journal of Aeronautics, Astronautics and Aviation
39 B
發行號1
出版狀態Published - 2007 四月 1

All Science Journal Classification (ASJC) codes

  • 航空工程
  • 空間與行星科學

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