내재적 경계조건 방법을 적용한 비정렬 격자 기반의 정상 압축성 Navier-Stokes 해석자

  • Baek, C. (Dept. of Aerospace Engineering, Inha Univ.) ;
  • Kim, M. (Dept. of Aerospace Engineering, Inha Univ.) ;
  • Choi, S. (Dept. of Aerospace Engineering, Inha Univ.) ;
  • Lee, S. (Dept. of Aerospace Engineering, Inha Univ.) ;
  • Kim, C.W. (Aerodynamic Research Team, Korea Aerospace Research Institute)
  • 백청 (인하대학교 항공우주공학과) ;
  • 김민수 (인하대학교 항공우주공학과) ;
  • 최선규 (인하대학교 항공우주공학과) ;
  • 이승수 (인하대학교 항공우주공학과) ;
  • 김철완 (한국항공우주연구원)
  • Received : 2016.01.18
  • Accepted : 2016.03.02
  • Published : 2016.03.31


Numerical boundary conditions are as important as the governing equations when analyzing the fluid flows numerically. An explicit boundary condition method updates the solutions at the boundaries with extrapolation from the interior of the computational domain, while the implicit boundary condition method in conjunction with an implicit time integration method solves the solutions of the entire computational domain including the boundaries simultaneously. The implicit boundary condition method, therefore, is more robust than the explicit boundary condition method. In this paper, steady compressible 2-Dimensional Navier-Stokes solver is developed. We present the implicit boundary condition method coupled with LU-SGS(Lower Upper Symmetric Gauss Seidel) method. Also, the explicit boundary condition method is implemented for comparison. The preconditioning Navier-Stokes equations are solved on unstructured meshes. The numerical computations for a number of flows show that the implicit boundary condition method can give accurate solutions.



Supported by : 항공우주연구원


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