Review of two-phase flow and flow boiling of mixtures in small and mini channels

Fundamental issues, mechanisms and models of flow boiling heat transfer in microscale channels

“…Cheng and Mewes [12] made a comparison of these different criteria for micro-scale channels. Figure 4 shows their comparable results for 11 water and CO 2 , which shows the big difference among these criteria.…”

“…The proposed criterion may have limitation when applied to other cases. In particular, it should be realised that their experiments 12 were conducted in microscale channels. As such, all flows are actually confined in the microchannels.…”

“…It is nowadays one of the most important research subjects in the field of heat transfer with various industrial and practical applications for the past decades [7][8][9][10][11]. For instance, as a highly efficient cooling technology, it has a lot of advantages of high heat transfer performance, chip temperature uniformity, hot spots cooling capability for cooling electronic chips and elements [4,[12][13][14][15][16]. The micro-electronics technology continues to develop very fast with very high heat flux to be dissipated up to 300 W/cm 2 or even more for cooling the electronic devices [2][3][4][5][13][14][15][16].…”

A composite heat transfer correlation for saturated flow boiling in small channels

“…As a final comparison to the literature, the ratio calc meas h h  (11) was calculated for all the measurements in the experimental database with the correlations listed in Table 2, as well as the proposed correlation. Figure 3 shows semi-logarithmic plots of this ratio for representative correlations chosen for being the most commonly used or for their best agreement with the database.…”

“…Existing heat transfer correlations are unable to accurately predict the flow boiling heat transfer coefficient in small channels over a wide range of operating parameters [1,4,11] as the heat transfer mechanisms are not fully understood. A recent review of the literature [1] showed that a pool boiling correlation [12] outperforms dedicated flow boiling correlations when applied to a large database of results from different research groups for channels of hydraulic diameters smaller than 2 mm.…”