- Issue:
- 2013年06期

- Page:
- 880-885

- Research Field:

- Publishing date:

- Title:
- Meshless least square method based on COP reconstruction for viscous flow simulation

- Author(s):
- Cai Xiaowei; Tan Junjie; Zhang Mu; Zhang Wanglong; Ren Dengfeng
- School of Energy and Power Engineering,NUST,Nanjing 210094,China

- Keywords:
- viscous flows; cloud of points reconstruction; meshless least square method; Lagrange interpolation

- PACS:
- O35

- DOI:
- -

- Abstract:
- A method to fit spatial derivatives using the cloud of points(COP)reconstruction is proposed for improving the simulation ability for viscous flows of the meshless least square method.An anisotropy COP is reconstituted in the boundary layer,and a nearly isotropic COP structure is formed to fit the meshless least square method calculation.The Lagrange interpolation is used to calculate the values of the new points,the AUSM+-UP scheme is used to calculate the numerical flux at the COP middle point,the least squares method is used to fit the spatial derivatives,and the third-order strong stability preserving(SSP)Runge-Kutta method is used for time marching.To validate the accuracy and robustness of the meshless least square method based on the COP reconstruction,the NACA0012 airfoil with different free stream conditions are simulated and the calculation results are compared with those of the traditional meshless least square methods.The results indicate that the simulation results of the meshless least square method based on COP reconstruction such as the location of the separation point and vortex center and the coefficient of surface pressure are closer to the reference results.

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- Memo:
- -

Last Update: 2013-12-31