HEAT TRANSFER AUGMENTATION AT A BACKWARD-FACING STEP

Abstract

Table 1: Sensitivity analysis for flow across the backward-facing step obstructed by an adiabatic circular cylinder. (Here Ncelis represents total number of cells in the grid, N. is the number of points on the surface of cylinder, Acylinder is the minimum grid spacing in the vicinity of the cylinder and AW ,, is the minimum grid spacing in the vicinity of the wall.) Table 2: Validation of the value of the reattachment length KR (Re = 100, ER = 2). Table 3: Coefficients of the exponential fit to the variation of the maximum Nusselt number (Numax) with Reynolds number (Re) for Pr = 0.71(air) and 1 < Re < 200: Table 4. Comparison of predicted Nusselt numbers with those of de Vahl Davis [68] under. various Rayleigh numbers. Table 5. Enhancement factors for various cases of rotation of the circular cylinder with respect to the stationary case.