Wettability modification to further enhance the pool boiling performance of the micro nano bi-porous copper surface structure

Mechanically Compliant Thermal Interfaces Using Biporous Copper‐Polydimethylsiloxane Interpenetrating Phase Composite

“…In addition to the pore morphology, we further calculate the structural porosity by considering the average structure thickness and mass of the BPCu structures (Table S1, Supporting Information): [ 37 ] where m is the net mass of the BPCu structure, ρ is the copper density, δ is the average structure thickness, and A proj is the projected area of BPCu structure. The porosities are calculated as 90.1–92.4% (orange markers in Figure 3e), where the values of the structural porosity are consistent with previously reported values.…”

“…The synchronized electrodeposition enables the fabrication of an interconnected, highly porous, and foam‐like 3D biporous copper (BPCu). While previous researches have investigated the two‐phase thermofluidic characteristics (e.g., boiling heat transfer enhancements) using porous copper, [ 33–38 ] the potential use of these materials in the form of metal/elastomer interpenetrating phase composites (IPCs) for TIMs applications remains unexplored.…”

Effect of grooves on nucleate boiling heat transfer from downward facing hemispherical surface

“…Various methods have been proposed for enhancing ERVC performance, including using structured surface, nanofluids (Pham et al, 2012;Angayarkanni and Philip, 2015) and thermal insulation (Yang et al, 2005;Noh and Suh, 2013). The structured surfaces include porous coating (Yang et al, 2006;Jun et al, 2016;Tetreault-Friend et al, 2016;Sohag et al, 2017;Wang et al, 2018), pin fins (Chu et al, 2013;Zhong et al, 2015), micro channels (Bai et al, 2016;Hou et al, 2017;Zhong et al, 2018aZhong et al, , 2018b, honeycomb porous plates (Mt Aznam et al, 2016;Fogaça et al, 2018), and spherical porous bodies (Mori et al, 2018), and so on. Yang et al (2006) fabricated a downward facing hemispherical surface with micro-porous coatings by sintering, while Sohag et al (2017) developed a Cold Spray technique to coat the same scale surface, both the coating surfaces were tested in the SBLB (Sub-scaled Boundary Layer Boiling) facility to investigate the CHF.…”

“…The CHF increased from ~1.4 MW/m 2 at the inclination angle of 0° to ~2.0 MW/m 2 at the inclination angle of 90°, which are 80%-350% higher than the CHF values of plain surface. Nanoporous hydrophilic surface (Tetreault-Friend et al, 2016) and micro nano bi-porous copper surface (Wang et al, 2018) could also enhance the CHF and boiling heat transfer coefficient significantly, while the reliability is a huge challenge for ERVC. Therefore, the pin fin surfaces (Chu et al, 2013;Zhong et al, 2015) and micro channels surfaces (Bai et al, 2016;Hou et al, 2017;Zhong et al, 2018aZhong et al, , 2018b were developed to improve the performance of ERVC.…”

Porous surfaces with structural gradient: Enhancing boiling heat transfer and its application in phase-change devices

“…(a) Mountain-like porous surface [11] ; (b) 3-D porous copper surface [12] ; (c) honeycomb-like porous copper surface [13] ; (d) forest-like porous copper surface [14] ; (e) honeycomb-like porous nickel surface [15] ; (f) boiling curve of honeycomb-like micro-nano porous copper surface [13] ; (g) relationship between the nucleation site diameter (D c ) and the wall superheat (ΔT w ) [13] ; (h) boiling curves of the forest-like copper surfaces [16] 临界热流密度提高3.7倍. Khan等人 El-Genk等人 [18] 、Li等人 [19] 、Furberg和Palm [20] 、 Xu等人 [21] 和Wang等人 [13,22,23] [24,25] : [14] . 我们也做了一系列不同 高度的样品, 并进行池沸腾实验, 相应的沸腾曲线如图 1(h)所示 [17] .…”