Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)
- Volume 20 Issue 9
- /
- Pages.2965-2972
- /
- 1996
- /
- 1226-4881(pISSN)
- /
- 2288-5324(eISSN)
DOI QR Code
Drirect Numerical Simulation of Transitional Separated Flows Part I:Primary Instability
천이박리유동의 직접수치모사 Part I:주 불안정성
- Yang, Gyeong-Su (Dept.of Mechanical Engineering, Inha University)
- 양경수 (인하대학교 기계공학과)
- Published : 1996.09.01
Abstract
Transitional flow in an obstructed channel is investigated using numerical simulation. Two-dimensional thin obstacles are mounted symmetrically in the vertical direction and periodically in the streamwise direction. Flow separation occurs at the tip of the sharp obstacles. Depending on the Reynolds number, the flow undergoes Hopf bifurcation as the primary instability leading to a two-dimensional unsteady periodic solution. At higher Reynolds numbers, the unsteady solution exhibits a symmetry-breaking bifurcation which results in an unsteady asymmetric solution. The results are compared with experiments currently available, and show a good agreement.
Keywords