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

Analysis of field synergy principle and the relationship between secondary flow and heat transfer in double-layered microchannels with cavities and ribs

“…Such as, helical ducts [12], a tube dundle of a preheater [13], a channel with longitudinal vortex generator [14], heat exchannger [15], et al In our pervious works, we fisrtly used this pinicple to investigate the essence of heat transfer enhancement in single-layered microchannels [16]. As mentioned above, this is the further work based on our previous works [16,17]. Firstly, two types of double-layered microchannels with different arrangement of cativities and ribs are presented.…”

“…Channel A presented in our previous work [17] was investigated the irreversibility casued by flow and heat transfer, which showed the best heat transfer performce among all channels. Channel A is composed of aligned triangular cavities and ribs.…”

Enhancement thermodynamic performance of microchannel heat sink by using a novel multi-nozzle structure

“…The overall thermal resistance of the heat sink can be calculated by Tuckerman and Pease [1], Hung et al [17], Leng et al [19] and Zhai et al [24],…”

“…Eight years later, it was reintroduced by Wei et al [14] with the thermal resistance improved up to 0.09°C/ Wcm 2 . Recently, DL-MCHSs were continuously investigated by other groups of authors such as Hung et al [15][16][17], Leng et al [18][19][20], Lin et al [21], Rajabifar et al [22], Wu et al [23], and Zhai et al [24]. The channel inlets of the upper layer of a DL-MCHS were designed on the top of the channel outlets of the lower layer; therefore, the temperature in the lower-layer-outlet region would be reduced compared to that of the single layer leading to the temperature on the bottom wall being more uniform.…”

“…This means that the DL-MCHS could not reduce the pressure drop compared to that of the single layer. Furthermore, Zhai et al [24] suggested that DL-MCHSs should not be used for cooling microelectronic equipment under a small volumetric flow rate due to a larger irreversibility. In 2012, Boteler et al [26] were first to propose the concept of a manifold microchannel heat sink (M-MCHS).…”