한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
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저 레이놀즈수에 적용 가능한 가상경계기법

AN IMMERSED BOUNDARY METHOD FOR LOW REYNOLDS NUMBER FLOWS

  • 박현욱 (연세대학교 계산과학공학과) ;
  • 이창훈 (연세대학교 계산과학공학과) ;
  • 최정일 (연세대학교 계산과학공학과)
  • Park, Hyun Wook (Dept. of Computational Science & Engineering, Yonsei Univ.) ;
  • Lee, Changhoon (Dept. of Computational Science & Engineering, Yonsei Univ.) ;
  • Choi, Jung-Il (Dept. of Computational Science & Engineering, Yonsei Univ.)
  • 투고 : 2013.07.02
  • 심사 : 2013.09.02
  • 발행 : 2013.09.30
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초록

We develop a novel immersed boundary (IB) method based on implicit direct forcing scheme for incompressible flows. The proposed IB method is based on an iterative procedure for calculating the direct forcing coupled with the momentum equations in order to satisfy no-slip boundary conditions on IB surfaces. We perform simulations of two-dimensional flows over a circular cylinder for low and moderate Reynolds numbers. The present method shows that the errors for estimated velocities on IB surfaces are significantly reduced even for low Reynolds number with a fairly large time step while the previous methods based on direct forcing failed to provide no-slip boundary conditions on IB surfaces.

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참고문헌

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