Euler solution using adaptive Cartesian grid with a gridless boundary treatment

查看全文 作　　者：L. Xiang G. Yang LHD of Institute of Mechanics, Chinese Academy of Sciences, 100190 Beijing, China 出　　处：《Acta Mechanica Sinica》索引2009年第25卷第2期,共10页 基　　金：supported by the National Natural Science Foundation of China (10672168) 摘　　要：A quadtree-based adaptive Cartesian gridgenerator and flow solver were developed.The grid adapta-tion based on pressure or density gradient was performed anda gridless method based on the least-square fashion was usedto treat the wall surface boundary condition,which is gene-rally difficult to be handled for the common Cartesian grid.First,to validate the technique of grid adaptation,the bench-marks over a forward-facing step and double Mach reflectionwere computed.Second,the flows over the NACA 0012 air-foil and a two-element airfoil were calculated to validate thedeveloped gridless method.The computational results indi-cate the developed method is reasonable for complex flows. 关 键 词：直角坐标网格 自适应 边界处理 欧拉 Mach反射 计算验证 复杂流动 最小二乘法