The study of optimization of finned heat sinks for impingement cooling of electronic components was undertaken. The procedure was based on a semiempirical zonal approach to the determination of thermal resistance as well as pressure drop. To test the validity of the model’s predictions, experiments and CFD (computational fluid dynamics) simulations were performed. The results provided support for the approach. The model enables cost-effective design calculations to be performed for the optimization of heat sinks. We performed such calculations to optimize an LSI heat sink in consideration of sixteen design parameters, including fin thickness, fin spacing, fin height, and flow-orifice dimensions. For the particular application considered in our study, the optimum fin thickness was found to be 0.15 mm. The characteristics and limitations of air cooling for such applications were investigated under various conditions.

1.
Ashiwake
N.
,
Nakayama
W.
,
Daikoku
T.
, and
Kobayashi
F.
,
1988
, “
Forced Convective Heat Transfer from LSI Packages in an Air-Cooled Wiring Card Array
,”
Heat Transfer Engineering
, Vol.
9
, No.
3
, pp.
76
84
.
2.
Biskeborn, R. G., Horvath, J. L., and Hultmark, E. B., 1984, “Integral Cap Heat Sink Assembly for the IBM 4381 Processor,” Proceedings Fourth Annual International Electronic Packaging Conference, pp. 468–474.
3.
Blasius, H., 1913, “Forsch. Geb. Ingenieurwes.,” No. 131.
4.
Boesmans, B., Christiaens, F., Berghmans, J., and Beyne, E., 1994, “Design of an Optimal Heat-Sink Geometry for Forced Convection Air Cooling of Multi-Chip Modules,” Thermal Management of Electronic Systems, C. J. Hoogendoorn, ed., Kluwer Academic Publishers, Boston, MA, pp. 267–276.
5.
Chapman, A. J., 1987, Fundamentals of Heat Transfer, Macmillion, NY, pp. 261.
6.
Choudhury
D.
,
1993
, “
A Study of Two Benchmark Heat Transfer Problems Using FLUENT
,”
ASME-HTD
, Vol.
255
, pp.
21
30
.
7.
Eckert, E. R. G., and Drake, R. M., 1972, “Analysis of Heat and Mass Transfer,” McGraw-Hill, NY, pp. 306–314.
8.
FLUENT, 1995, “User’s Guide—Version 4.3,” Fluent Incorporated, Lebanon, NH, USA.
9.
Goldberg
N.
,
1984
, “
Narrow Channel Forced Air Heat Sink
,”
IEEE Trans. on Components, Hybrids, and Manufacturing Technology
, Vol.
CHMT-7
, No.
1
, pp.
154
159
.
10.
Hilbert
C.
,
Sommerfeldt
S.
,
Gupta
O.
, and
Herrell
D.
,
1990
, “
High Performance Air-Cooled Heat Sinks for Integrated Circuits
,”
IEEE Trans. on Components, Hybrids, and Manufacturing Technology
, Vol.
13
, No.
4
, pp.
1022
1031
.
11.
Holman, J. P., 1976, Heat Transfer, McGraw-Hill, NY, pp. 13–14 and pp. 38–41.
12.
Kays, W. M., and London, A. L., 1955, Compact Heat Exchangers, McGraw-Hill, NY, pp. 93.
13.
Kays, W. M., and Crawford, M. E., 1980, Convective Heat Mass Transfer, 2nd ed., McGraw-Hill, NY, pp. 243.
14.
Knight, R. W., Goodling, J. S., and Gross, B. E., 1992, “Optimal Thermal Design of Air Cooled Forced Convection Finned Heat Sinks-Experimental Verification,” IEEE InterSociety Conference on Thermal Phenomena, pp. 206–212.
15.
LeFevre, E. J., 1956, Proc. 9th Intern. Congr. Appl. Mech., Vol. 4, pp. 168–171.
16.
Mahalingham, M., and Andrew, J., 1987, “High Performance Air Cooling for Microelectronics,” Proceeding of the International Symposium on Cooling Technology for Electronic Equipment, pp. 608–625.
17.
Martin
H.
,
1977
, “
Heat Mass Transfer Between Impinging Gas Jets and Solid Surfaces
,”
Advances in Heat Transfer
, J. P. Hartnett, and T. F. Irvine, eds., Vol.
13
, pp.
1
60
.
18.
Nakayama
W.
,
1995
, “
Heat-Transfer Engineering in Systems Integration: Outlook for Closer Coupling of Thermal and Electrical Designs of Computers
,”
IEEE Transactions on Components, Packaging, and Manufacturing Technology—Part A
, Vol.
18
, No.
8
, pp.
818
826
.
19.
Prandtl, L., and Tietjents, O. G., 1934, Fundamentals of Hydro- and Aeromechanics, Dover, NY, pp. 243.
20.
Sprengen
H.
,
1969
,
Schweiz. Bauzeit.
, Vol.
87–13
, pp.
223
223
.
21.
Stoecker, W. F., 1971, Design of Thermal Systems, McGraw-Hill, NY, pp. 135–159.
22.
Touloukian
Y. S.
, et al.,
1972
, “
Thermophysical Properties of Matter
,”,
IFI/PLENUM
Vol.
9
, pp.
1199
1202
.
23.
Weisbach
J.
,
1896
,
Ingenieur und Mashinen-Mechnik
, Vol.
1
, pp.
1003
1003
.
24.
Yakhot
V.
, and
Orszag
S. A.
,
1986
, “
Renormalization Group Analysis of Turbulence-1: Basic Theory
,”
J Scientific Computing
, Vol.
1
, pp.
1
51
.
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