Analysis of heat transfer characteristics of double-layered microchannel heat sink

Optimization of thermal resistance and bottom wall temperature uniformity for double-layered microchannel heat sink

“…Vafai and Zhu [21] proposed a new design concept of double-layered microchannel heat sink (DL-MCHS), where two single-layered microchannel heat sinks (SL-MCHS) are staked one on top of the other. Following Vafai and Zhu's work, extensive studies focused on the DL-MCHS were conducted [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37], which further justified the results indicated by Vafai and Zhu [22][23][24], demonstrated that the channel number [25,26], aspect ratios of the top and bottom channels [25][26][27][28][29], channel-to-pitch width ratio [25], and inlet velocities of both layers [26,30] have important effects on the DL-MCHS, and obtained the optimal values of these parameters. In these studies [25][26][27][28][29][30], when the effect of a specific parameter on the DL-MCHS was examined, the other parameters remained unchanged.…”

Characteristics of entropy generation and heat transfer in double-layered micro heat sinks with complex structure

“…The above literature review showed that the authors all considered as DL-MCHSs having better thermal performance than [4][5][6][7][9][10][11][12]24,25] all pointed out the pressure drop of DL-MCHSs were lower that of SL-MCHSs, while the Work of Wu et al [8] gave the opposite conclusion.…”

“…They pointed out that both the temperature rise and pressure drop were substantially lower than that in SL-MCHSs. Following their works, a considerable effort has been devoted to the study of the characteristic of the flow and heat transfer in such micro heat sinks [5][6][7][8][9][10][11][12].…”

“…In addition to the investigation of thermal performance of DL-MCHSs, recently Huang et al [9][10][11], Lin et al [12] and Leng et al [20] conducted a series of optimized works of such heat sinks by using conjugate-gradient method.…”

Optimal Thermal Design of a Stacked Mini-Channel Heat Sink Cooled by a Low Flow Rate Coolant

“…Single layer micro-channel heat sinks have been the most extensively studied form, but stacked multi-layer micro-or mini-channel heat sinks may have significant advantages because they can offer a high thermal performance with tolerable pressure drop and low flow rates. Some studies on multi layer micro-and mini-channel heat sinks have been conducted [4][5][6][7][8][9][10][11][12]. They showed that the overall thermal resistance for a two layered micro-channel stack was 30 percent less than for the single layered micro-channel due to doubling of the heat transfer area, even though the dimensions of micro-channel were not optimized.…”