화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.31, No.11, 1954-1963, November, 2014
DOI10.1007/s11814-014-0092-5  Export Citation
Low Reynolds number flow of power-law fluids over two square cylinders in tandem
Radhe Shyam, and Rajendra Prasad Chhabra†
  • Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India
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The governing partial differential equations have been solved numerically for the 2-D and steady powerlaw fluid flow over two square cylinders in tandem arrangement. Extensive numerical results spanning wide ranges of the governing parameters as Reynolds number (0.1≤Re≤40), power-law index (0.2≤n≤1) and inter-cylinder spacing (2≤L/d≤6) are presented herein; limited results for L/d=24 are also obtained to approach the single cylinder behavior. The detailed flow visualization is done by means of the streamline and vorticity contours in the vicinity of two cylinders. The global characteristics are analyzed in terms of the surface pressure distribution and pressure drag coefficient. The drag coefficient shows the classical inverse dependence on the Reynolds number irrespective of the value of the powerlaw index; the drag on the upstream cylinder is always greater than that for the downstream cylinder.
Keywords:Tandem Square Cylinders;Power-law Fluids;Reynolds Number;Drag Coefficient;Recirculation Length
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