In the present study, fluid-flow and heat-transfer characteristics of a microchannel heat sink subject to an impinging jet are experimentally investigated. In order to evaluate the cooling performance of a microchannel heat sink subject to an impinging jet under the condition of fixed pumping power, the pressure drop across the heat sink and temperature distributions at its base are measured. Specifically, a microthermal sensor array is fabricated and used to accurately measure temperature distributions at the base of the heat sink. Based on these experimental results, a correlation for the pressure drop across a microchannel heat sink subject to an impinging jet and a correlation for its thermal resistance are suggested. In addition, it is shown that the cooling performance of an optimized microchannel heat sink subject to an impinging jet is enhanced by about 21% compared to that of the optimized microchannel heat sink with a parallel flow under the fixed-pumping-power condition.

Issue Section:
Electronic Cooling
Keywords:
heat sinks, microfluidics, channel flow, jets, cooling, micropumps, temperature distribution, microsensors, thermal resistance
Topics:
Cooling, Fluid dynamics, Heat sinks, Microchannels, Thermal resistance, Flow (Dynamics), Pressure drop, Sensors, Temperature distribution
1.
Chu
,
R. C.
, 1986, “
Heat Transfer in Electronic Systems
,” in
Proceedings of the 8th International Conference on Heat Transfer
, New York, pp.
293
–
305
.
2.
Tuckerman
,
D. B.
, and
Pease
,
R. F. W.
, 1981, “
High-Performance Heat Sinking for VLSI
,”
IEEE Electron Device Lett.
0741-3106,
2
, pp.
126
–
129
.
Crossref
Search ADS
 
3.
Tuckerman
,
D. B.
, and
Pease
,
R. F. W.
, 1982, “
Ultrahigh Thermal Conductance Microstructure for Integrated Circuits
,”
IEEE Proc. 32nd Electronics Conference
, pp.
145
–
149
.
4.
Copeland
,
D.
,
Behnia
,
M.
, and
Nakayama
,
W.
, 1997, “
Manifold Microchannel Heat Sinks: Isothermal Analysis
,”
IEEE Trans. Compon., Packag. Manuf. Technol., Part A
1070-9886,
20
, pp.
96
–
102
.
Crossref
Search ADS
 
5.
Pak
,
B. C.
,
Chun
,
W. C.
,
Baek
,
B. J.
, and
Copeland
,
D.
, 1997, “
Forced Air Cooling by Using Manifold Microchannel Heat Sinks
,”
Adv. Electron. Circuit Packag.
0065-2520,
2
, pp.
1837
–
1842
.
6.
Kim
,
S. Y.
,
Kang
,
B. H.
, and
Kim
,
J. H.
, 2001, “
Forced Convection From Aluminum Foam Materials in an Asymmetrically Heated Channel
,”
Int. J. Heat Mass Transfer
0017-9310,
44
, pp.
1451
–
1454
.
Crossref
Search ADS
 
7.
Kim
,
S. J.
, and
Jang
,
S. P.
, 2001, “
Experimental and Numerical Analysis of Heat Transfer Phenomena in a Sensor Tube of a Mass Flow Controller
,”
Int. J. Heat Mass Transfer
0017-9310,
44
, pp.
1711
–
1724
.
Crossref
Search ADS
 
8.
Kondo
,
Y.
,
Behnia
,
M.
,
Nakayama
,
W.
, and
Matsushima
,
H.
, 1998, “
Optimization of Finned Heat Sinks for Impingement Cooling of Electronic Packages
,”
ASME J. Electron. Packag.
1043-7398,
120
, pp.
259
–
266
.
Crossref
Search ADS
 
9.
Choi
,
S. B.
,
Barron
,
R. F.
, and
Warrington
,
R. O.
, 1991, “
Fluid Flow and Heat Transfer in Microtubes
,”
ASME Micromechanical Sensors, Actuators and Systems
,
32
, pp.
123
–
134
.
10.
Rahman
,
M. M.
, 2000, “
Measurements of Heat Transfer in Microchannel Heat Sinks
,”
Int. Commun. Heat Mass Transfer
0735-1933,
27
, pp.
497
–
506
.
11.
Harms
,
T. M.
,
Kazmierczak
,
F. M.
, and
Gerner
,
F. M.
, 1999, “
Developing Convective Heat Transfer in Deep Rectangular Microchannels
,”
Int. J. Heat Fluid Flow
0142-727X,
20
, pp.
149
–
157
.
Crossref
Search ADS
 
12.
Jang
,
S. P.
,
Kim
,
S. J.
, and
Paik
,
K. W.
, 2003, “
Experimental Investigation of Thermal Characteristics for a Microchannel Heat Sink Subject to an Impinging Jet, Using a Micro-Thermal Sensor Array
,”
Sens. Actuators, A
0924-4247,
105
, pp.
211
–
224
.
Crossref
Search ADS
 
13.
Kim
,
S. J.
, and
Jang
,
S. P.
, 2002, “
Effects of the Darcy Number, the Prandtl Number and the Reynolds Number on Local Thermal Non-Equilibrium
,”
Int. J. Heat Mass Transfer
0017-9310,
45
, pp.
3885
–
3896
.
Crossref
Search ADS
 
14.
Jang
,
S. P.
, “
Experimental and Numerical Study on Heat Transfer Enhancement Using a Microchannel Heat Sink Subject to an Impinging Jet
,” Doctoral thesis in KAIST, 2004.
15.
Blevins
,
R. D.
, 1992,
Applied Fluid Dynamics Handbook
, Krieger, Malabar.
16.
Lau
,
K. S.
,
Mahajan
,
L. R.
, 1989, “
Effects of Tip Clearance and Fin Density on the Performance of Heat Sinks for VLSI Packages
,”
IEEE Trans. Compon., Hybrids, Manuf. Technol.
0148-6411,
12
, pp.
757
–
765
.
Crossref
Search ADS
 
17.
Hilbert
,
C.
,
Sommerfeldt
,
S.
,
Gupta
,
O.
,
Herrell
,
D. J.
, 1990, “
High Performance Air Cooled Heat Sinks for Integrated Circuits
,”
IEEE Trans. Compon., Hybrids, Manuf. Technol.
0148-6411,
13
, pp.
1022
–
1031
.
Crossref
Search ADS
 
18.
Knight
,
R. W.
,
Hall
,
D. J.
,
Gooding
,
S. J.
, and
Jaeger
,
R. C.
, 1992, “
Heat Sink Optimization With Application to Microchannels
,”
IEEE Trans. Compon., Hybrids, Manuf. Technol.
0148-6411,
15
, pp.
823
–
842
.
19.
Kim
,
S. J.
, and
Kim
,
D.
, 1999, “
Forced Convection in Microstructure for Electronic Equipment Cooling
,”
ASME J. Heat Transfer
0022-1481,
121
, pp.
635
–
645
.
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