Numerical Investigation of Asymmetric Flow in a Symmetric Channel with Sudden Expansion

대칭 확대 도관에서의 비대칭 흐름에 관한 연구

  • 민병광 (한국과학기술원 항공우주공학과) ;
  • 장근식 (한국과학기술원 항공우주공학과)
  • Published : 1996.05.01

Abstract

The full incompressible Navier-Stokes equations are numerically integrated to solve the unsteady channel flow using a new numerical scheme of second-order accuracy developed by the authors. It is well known that in spite of the symmetry in the boundary condition and geometry, asymmetry can develop with time-dependency in a channel with sudden expansion. The instability of the shear flow and the cross-channel pressure contribute to such asymmetric flow. In this paper, we successfully generated a channel flow in which vortex waves were propagated downstream due to the harmonically oscillating inlet flow. The structure of the eddies and wall vorticity are parametrically investigated.

Keywords