Numerical Investigation of Forced Convective Heat Transfer and Fluid Flow Analysis in a Double Lid Driven Staggered Cavity With Various Blocks

Abstract

The investigation reported in this project is dealt about the Steady-state laminar flow and heat transfer in a lid-driven staggered cavity with two heated blocks. Based on the aspect ratio (AR = H / L = 1, H / L = 2, H / L = 1 (circle)), three different block shapes for numerical experiments are introduced. Huge blocks with no slip or static wall conditions are considered and placed in the geometric center of the cavity. The simulation is run for Reynolds numbers 100, 200, 500, 1000, and 2000 and the block temperature is 573K. The top lid moves to the right and the bottom lid moves to the left. Both are considered the same speed.. It was found that the dynamics and structure of the primary vortex and the angular vortex are strongly influenced by the Reynolds number. Studies clearly show that as the Reynolds number increases, the total drag coefficient decreases. The study reveals the important flow physics such as flow separation, boundary-layer and recirculation. The results will be beneficial for similar situation occur in many industrial problems. shows a schematic diagram of a zigzag cavity driven by a double-sided lid. Here, both the top and bottom lids move at the same speed, the top wall moves parallel forward, and the bottom wall moves in the next direction. antiparallel backward direction. The two block is placed at the center of diagonally symmetric cavity. Blocks are maintained at uniform temperature. The top lid is assumed to move at a prescribed positive horizontal velocity value and the bottom lid moves with a negative velocity with a magnitude equal to the velocity of the top lid. while the left and right are adiabatic.