STUDY ON THE HEAT TRANSFER CHARACTERISTICS OF MICROCHANNEL HEAT SINK WITH CANTOR FRACTAL STRUCTURE
Abstract
This paper does a three-dimensional steady-state simulation analysis of a microchannel heat sink with a cantor fractal structure, and the layout, size, spacing, and fractal frequency of the baffle are optimized. Following further testing, it was determined that putting rectangular baffles on the same sidewall provides a superior effect, with a 4.95∘C lower effect than normal microchannels. The temperature of the two-time fractal structure is 4.47∘C lower than that of the zero-time fractal structure at the Reynolds number (Re) of 200. The control variable method is used to explore the size and spacing of the rectangular baffles, and the temperature and pressure drop are thoroughly analyzed to determine the ideal structure, S=0.2mm, B=0.1mm, h=0.038mm, and e=0.02mm. Following that, the influence of Re on heat transmission is addressed. Finally, to incorporate the fluid’s heat transmission and pressure drop, the enhanced heat transfer factor PEC is used to evaluate the overall heat transfer performance of the microchannel. In the Re range of 100–300, PEC is greater than 1, which is 10–42% higher than that of conventional microchannels.
