Two-phase
transport is promising in addressing the cooling challenges
facing high power microelectronics. Through evaporation of latent heat, two-phase
heat transfer can enable a uniform temperature field under high working heat flux conditions along with a reduced pumping power, which is highly desirable to
realize highly effective direct cooling or to integrate two-phase
microchannel
cooling for future high power electronics. However, it is extremely challenging
owing to the fact that two-phase transport performance is primarily governed and also limited by the detrimental aspects of complex two-phase flow in conventional channels. Two-phase transport at micro/nanoscale becomes more unpredictable
due to the unfavorable size effects. Over the past decade, extensive progress has
been made in understanding two-phase
transport on various microchannel designs
and configurations. It has been driven by the intrinsic scientific interest and needs of emerging applications to realize a favorable control of complex two-phase flows. Most recently, Dr. Li’s group has devised several novel micro/nanoscale fluidic
control methods. Through designing novel micro/nanoscale structures, these
methods can (a) passively generate sustainable and on-demand
mixing in the laminar flow regime in microchannels, or (b) intentionally reduce transitional twophase
flow regimes into a single and favorable flow regime for better heat transfer
performance and flow characteristics, or (c) even reconstruct boundary layers to
select and promote favorable two-phase
flow structure and heat transfer modes
during flow boiling in microchannels. Drastic enhancements have been
demonstrated. In this talk, Dr. Li would like to share his recent progress in understanding these micro/nanoscale fluidic control methods.
https://mediaspace.gatech.edu/media/li/1_skdjc9h3
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