Improving Thermal Performance of Rectangular Microchannel Heat Sinks using Porous Layer: CFD Simulation and Optimization

Microchannel heat sinks are very widely used due to their high transfer coefficients and low refrigerant requirements. Nevertheless, microchannel still perform sub-optimally when it comes thermal performance. Therefore, this paper investigates the individual combined impacts of different characteristics porous media on performance microchannel. Four porosity values considered: 0.8, 0.85, 0.9, 0.95. The evaluation is based three-dimensional computational fluid dynamics simulations. Due large number degrees freedom in study, Constructal Theory Design Experiments employed. In response surface type Genetic Aggregation, while Latin Hypercube Sampling algorithm for data sampling optimization. Combining layers with reduces maximum temperatures about 3K. It also observed that a lower temperature achieved cases less porosity. Furthermore, optimal geometry size microchannels determined.