Flow boiling characteristics in porous heat sink with reentrant microchannels

Comparative experimental study on pool boiling performance of porous coating and solid structures with reentrant channels

“…The procedures have been illustrated in our previous paper [38], and are briefly described here for completeness. A graphite-based plate is utilized to process the convex Ω-shaped module by micro electrical discharge machining (EDM) wire cut.…”

Flow boiling performance of Ω-shaped reentrant copper microchannels with different channel sizes

“…Heat transfer coefficients and pressure drop are thus determined by using the averaged values from the measured data for 2 min. Despite that the fluctuations of inlet/outlet temperatures and pressure existed over the test period in certain conditions due to the flow instabilities, the wall temperatures were found to fluctuate within a very small range of degrees, i.e., 1-2°C [29]. Besides, the averaged test values over the steady-state period are utilized for the data reduction, which are expected to give the meaningful results.…”

“…The wall temperature of microchannel (T w,tci ) is deduced from a thermal resistance network as detailed in the previous study [29], where T tci is the measured temperatures in the copper block as depicted in Fig. 4, k Cu , k s , k m are the thermal conductivities of copper, solder and the microchannel base, respectively.…”

Formation of Al-Ni Intermetallic Layers Lining Microchannels Produced by Powder-Metallurgical Process Using Aluminum Sacrificial Cores

“…In recent years, microchannel devices such as microreactors [1][2][3][4][5][6][7][8][9][10][11][12][13] and microchannel heat sinks [14][15][16][17][18] have actively been investigated with attention on the excellent heat exchange capability coming from the high surface to volume ratio of the microchannel structure. The heat exchange capability is one of the essential properties in the microreactor systems for precise control of reaction temperatures and effective use of heat from external sources.…”

“…The lining layer mainly consists of NiAl and has peculiar porous structure in which long and thin micropores have grown along the thickness direction of the lining layer. 25) Such a porous structure of the inner wall of the microchannel is expected to improve ow boiling stability and enhance forced convective heat transfer [16][17][18] . In addition, the NiAl intermetallic compound has a high thermal conductivity, good heat resistance and excellent corrosion resistance.…”