@Article{icces.2023.08963,
AUTHOR = {Zihuan Ma, Xiang Ma, Chengyu Hu, Jinjia	Wei},
TITLE = {Numerical	Simulation	of	Flow	Boiling	of	HFE-7100	in	Horizontal	 Rectangular	Single	Microchannel},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {26},
YEAR = {2023},
NUMBER = {2},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v26n2/53907},
ISSN = {1933-2815},
ABSTRACT = {Flow	 boiling	 in	 microchannel	 heat	 sinks	 is considered	 as a	 promising	 cooling	 solution	 for	 electronic	
components.	 Higher	 heat	 flux	 can	 be	 effectively	 dissipated	 by	 the	 utilization	 of	 the	 latent	 heat	 of	
vaporization.	 However,	 most	 of	 the	 current	 studies	 on	 flow	 boiling	 in	 microchannels	 are	 mainly	
experimental	 investigations and	 two-dimensional	 numerical	 studies.	 In	 this	 paper,	 the	 Volume	 of	 Fluid	
(VOF)	model	combined	with	the	Lee	evaporation-condensation	phase	change	model	is	used	to	simulate	the	
flow	boiling	of	HFE7100	in	horizontal	microchannels	by	three-dimensional	conjugate	numerical	simulation.	
The	 numerical	 simulation	 results	 are	 compared	with	 the	 experimental	 results	 [1],	 showing	 an	 excellent	
agreement.	 The	 flow	 pattern	 of	 HFE7100	 in	 the	 microchannels are	 obtained.	 The	 typical	 flow	 pattern	
includes	 bubble	 flow,	 slug	 flow,	 annular	 flow,	 et	 al. In	 addition,	 the	 effect	 of	 heat	 flux	 on	 the	 local	 wall	
superheat	 (<i>ΔT<sub>loc</sub></i>)	 and	 heat	 transfer	 coefficient	 (<i>h<sub>loc</sub></i>)	 along	 the	 flow	 direction	 is	 discussed	 in	 detail	 at	 a	
constant	mass	flux.	At	the	entrance	of	the	channel,	the	temperature	boundary	layer	is	thinner,	showing	a
higher local	heat	transfer coefficient.	At	a	low	heat	flux,	the	local	heat	transfer coefficient is	higher due	to	the	
lower	wall	superheat at	the	entrance	of	the	microchannel.	Furthermore,	it	is	observed	that	the	local	heat	
transfer	 coefficient decreases	 along	 the	 flow	 direction	 and	 tend to	 reach	 a	 constant	 value	 at	 a	 certain	
location.	Overall,	the	local	heat	transfer coefficient increases	with	increasing	heat	flux.	This	is because more	
nucleation	sites	are	activated	at	the	high	heat	flux	and	thus	enhance	nucleate	boiling.	When	the	heat	flux	is	
70	kW/m<sup>2</sup>,	the	maximum	local	average	heat	transfer	coefficient	is	10862 W/m<sup>2</sup>K. The	numerical	simulation	
methods used	in	this	study	can	provide	guidance	for	the	design	of	microchannel	heat	sinks.},
DOI = {10.32604/icces.2023.08963}
}