A comparative study of experimental flow boiling heat transfer and pressure characteristics in straight- and oblique-finned microchannels

A hierarchical manifold microchannel heat sink array for high-heat-flux two-phase cooling of electronics

“…A variety of heat sink designs have been employed to dissipate larger heat fluxes by delaying CHF or reducing the pressure drop in two-phase operation compared to a conventional design with straight, parallel channels fed by a single header. These designs have implemented one or more of features such as vapor venting [10], pin-fins and interrupted channels of various shapes and configurations [10][11][12], wick structures to aid in thin film evaporation [13][14][15], microchannels with reentrant cavities and/or inlet restrictors [16], microgaps [17], arrays of jets [18][19][20][21], diverging channels [22,23], microchannels fed with tapered manifolds [24], and stacked heat sinks [25]. Heat fluxes as high as 1127 W/cm² have been dissipated with dielectric fluids [26] using a 10 mm × 20 mm copper heat sink that incorporated both flow boiling in microchannels and jet impingement.…”

Effects of varying oblique angles on flow boiling heat transfer and pressure characteristics in oblique-finned microchannels

“…1. The descriptions are similar to Law et al [12] and Law and Lee [10], however, there are a few changes made in the temperature and pressure sensors, as listed in Table 1. The accuracy of the various sensors and equipment used in this study is given in Table 3 under Section 3.3.…”

“…14. This is likely to produce a greater degree of disruptions and re-initialisations of the thin liquid-film, which is revealed to be beneficial for twophase convective boiling heat transfer [10]. As shown in Fig.…”

“…Law and Lee [10] compared the oblique-finned microchannels with the straight-finned microchannels using FC-72 in terms of their two-phase heat transfer performance, critical heat flux, temperature uniformity, pressure drop and flow boiling instability characteristics. The authors reported that the oblique fins not only offer improved heat transfer performance, they also highly stabilise the flow boiling process by allowing parallel microchannels to ''communicate" with their neighbours.…”

Investigation of fluid flow and heat transfer of compressible flow in a constricted microchannel

“…Law and Lee [29] did a comparative study on the heat transfer performance, pressure drop, and instability characteristics in straight-nned and oblique-nned microchannels, and showed that the heat transfer performance of the oblique-nned microchannels is signi cantly better than its straight-nned counterpart.…”