Parametric study on the performance of double-layered microchannels 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

“…This is in good agreement with those obtained in Refs. [4][5][6][7][8]. Furthermore, Case 4 exhibits the most uniform bottom temperature (about 35°C for V = 36 ml/min) along Fig.…”

“…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.…”

“…Their results showed that DL-MCHS not only reduced the pressure drop but also had better thermal performance compared with SL-MCHS under the same pumping power. Wu et al [8] numerically conducted DL-MCHS with current flow under different geometrical parameters and flow conditions. They found that the overall performance increased by adjusting the inlet velocity of upper channels to http be smaller.…”

“…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].…”