Performance of Interrupted Minichannel Heat Sink Using Various Coolant Fluids

The advancement in the micro electro mechanical system, MEMS, had been utilized for several years before. This embarked on the compact and high density of power generation for tiny devices. This led to the development of a heat dissipating system for high-power-density devices. Hence, the work intends to simulate the fluid flow performance of interrupted minichannel heat sinks due to the redeveloping and interrupting of the boundary layer merging in previous work that augments the heat dissipation. The study is conducted through numerical work of laminar steady flow, by governing the Navier-Stokes and energy equation. Three interrupted minichannel heat sinks were investigated and compared with a straight channel as the baseline by varying the Reynold number, Re and the heat supplied, Q. Meanwhile, three types of coolant fluids; propylene glycol-water, pgw-water, and ZnO-water (2%) were examined. Validation was performed to compare the pressure drop and Nusselt number, Nu which deviated between 0.49% to 9.81%, and 1.08% to 12.48% respectively. The flow is controlled to satisfy the range of Re and Q at which 510.9 < Re <610.8 and 79.2< Q < 297 respectively. At various Re and Q, Design C was the best use for pgw-water, and Design B for ZnO-water. The general performance, GP for pgwwater and ZnO-water were predicted to be 1.2 to 1.9, and 0.7 to 1.5 respectively at various Re. Furthermore, as Q varied, GP was 1.2 to 1.6, and 1.3 to 1.7 respectively.