Numerical Study of Submerged Impinging Water Jets Under High Heat Flux for Laminar Flow Conditions

A numerical investigation has been conducted with the aim to study the effect of Re number and jet inlet temperature (Ti) on the heat transfer of submerged impinging jet used to cool high heat flux dissipating components, which are representing electronic components. In order to obtain realistic results all equipment which could affect the flow and heat transfer, such as antenna etc. has been modelled. Hence, in this study 4 pieces of heaters were located under a heat rejection plate, where a 2 × 2 jet arrangement was used in an enclosure. Water was used as coolant fluid. The effects of Re (100–800) and coolant fluid inlet temperature (15 ℃–45 ℃) under constant jet–to–plate distance of H = 4 mm on heat transfer was examined numerically. The aim of the study was to show the heat transfer in order to represent the effect of Re number and coolant fluid temperature on submerged impinging water jet heat extraction capacity. It was observed that heat transfer increases with increasing Re number and decreasing fluid inlet temperature. In addition, it was observed that with the increase in Re number the plate temperature decreases with a decreasing rate.