An investigation on topologies of hybrid manifold, impinging-jet nozzle and micro-pin-fin heat sinks

The hybrid manifold micro-pin-fin (MMPF) heat sink combined nozzle jets is an option for large-scale integrated circuits (LSI). The demond for uniform and ultra-high heat flux removal by MMPF heat sink has not been adequately investigated. This work aims to solve the problem of fluid organization. The proposed basic tiling topologies, including square, regular hexagon, 30° rhombus, and 60° rhombus topologies, provide different organized fluid flows and heat transfer patterns. The present study focuses on comparing these topologies according to independent porous medium parameters, such as nozzle pore size D_Z, flow pore size D_X,Y, and porosity ε. The results show that the square topology achieves the smallest total thermal resistance R_tot value of 0.0975 × 10⁻⁴ K m²/W, while the hexagon topology achieved the highest value of COP/ΔT, which was 2033.9 K⁻¹. According to the sensitivity analysis results, the optimal total thermal resistance can be obtained by balancing the influences of nozzle pore size, flow pore size, and porosity. The optimal pressure drop can be obtained by maximizing the porosity.