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A Cartesian grid method with improvement of resolving the boundary layer structure for two‐dimensional incompressible flows
Author(s) -
Tong Xin,
Wang Lipo,
Chen Jinqiang,
Ouyang Hua
Publication year - 2021
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.4991
Subject(s) - cartesian coordinate system , boundary layer , regular grid , computational fluid dynamics , drag , grid , boundary (topology) , compressibility , mesh generation , mathematics , computer science , geometry , mathematical analysis , mechanics , physics , engineering , finite element method , structural engineering
The Cartesian gird has its unique advantages in computational fluid dynamics, especially for complicated boundary cases. However, the boundary layer structures can not be resolved efficiently and effectively using the Cartesian mesh. To overcome such a problem, a new boundary layer structure resolving (BLSR) algorithm is proposed on the basis of the boundary layer physics and force balance analysis. For the present two‐dimensional test cases, numerical results justify that the surface friction and drag force can be more accurately calculated without refining the near‐wall resolution. In principle this BLSR algorithm is easy to implement with negligible increase of the computational cost.