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Issue
Korean Journal of Chemical Engineering,
Vol.31, No.11, 1954-1963, 2014
Low Reynolds number flow of power-law fluids over two square cylinders in tandem
Shyam R, Chhabra RP
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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