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Boundary Layer Mesh Generation Using Vector Fields Computed by the Boundary Element Method

Xiao, Zhoufang, Jianjun Chen, Yao Zheng, Jifa Zhang

Posters, 25th International Meshing Roundtable, Sandia National Laboratories, September 26-30 2016

INTERNATIONAL
MESHING
ROUNTABLE

25th International Meshing Roundtable
Washington DC, U.S.A.
September 26-30, 2016

Zhoufang Xiao, Zhejiang University, CN,
Jianjun Chen, Zhejiang University, CN, chenjj@zju.edu.cn
Yao Zheng, Zhejiang University, CN,
Jifa Zhang, Zhejiang University, CN,

Poster Abstract
A typical mesh configuration for viscous flow simulations is to create prismatic elements in boundary layers by marching the surface triangulation on viscous walls along certain directions. The quality of resulting elements and the reliability of the meshing procedure thus highly depend on the computing strategy of marching directions. In this study, we propose to compute a field of marching directions governed by a vector-form Laplacian equation. This approach could ensure the smooth transition of marching directions, thereby leading to more desirable element shapes. Besides, the possible intersections of elements growing from opposite sides of a narrow region could be identified by analyzing vector field. With respect to the solution of the governing equation, the boundary element method (BEM) is preferred for its solution accuracy. Meanwhile, only the surface triangulation instead of volume mesh is needed as the input of the BEM.

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