Optimization of a staggered jet-convex dimple array cooling system

Analysis and optimization of a staggered jet-convex dimple array cooling system were performed. A steady incompressible laminar flow and heat transfer in the cooling system were analyzed using three-dimensional Navier-Stokes equations. For the optimization, two design variables, namely the ratio of the height of the dimple to the diameter of the jet and the ratio of the diameter of the dimple to the diameter of the jet, were selected. In addition, thermal resistance was selected as the objective function to evaluate cooling performance. A preliminary parametric study of the objective function was conducted using the design variables, and then, a surrogate modeling of the objective function was performed using the Kriging model. In the optimal design, a lower thermal resistance was achieved with higher pressure drop compared with the reference design. Furthermore, comparative flow analyses for the optimal and reference designs were also performed.