Experimental measurements were obtained to characterize the thermal performance of ducted air suction in conjunction with a pin-fin heat sink. Four single nozzles of different diameters and two multiple-nozzle arrays were studied at a fixed nozzle-to-target distance, for different turbulent Reynolds numbers $5000⩽Re⩽20,000.$ Variations of nozzle-to-target distance, i.e., open area, in ducted suction were found to have a strong effect on heat transfer especially with the larger diameter single nozzle and both multiple-nozzle arrays. Enhancement factors were computed with the heat sink in suction flow, relative to a bare surface, and were in the range of 8.3 to 17.7, with the largest value being obtained for the nine-nozzle array. Results from the present study on air jet suction are compared with previous experiments with air jet impingement on the pin-fin heat sink. Average heat transfer coefficients and thermal resistance values are reported for the heat sink as a function of Reynolds number, air flow rate, and pumping power. [S1043-7398(00)00903-8]

1.
Choi
,
S. B.
, and
Kim
,
W. T.
,
1993
, “
Air jet impingement cooling of simulated multichip modules in the electronics
,”
,
4
, pp.
679
683
.
2.
Copeland
,
D.
,
1995
, “
Single-phase and boiling cooling of small pin-fin arrays by multiple slot nozzle suction and impingement
,”
IEEE Trans. Compon., Packag., Manufact. Technol.
,
18
, pp.
510
516
.
3.
Bartilson, B. W., 1991, “Air jet impingement on a miniature pin-fin heat sink,” ASME Paper No. 91-WA/EEP-41.
4.
Brignoni
,
L. A.
, and
Garimella
,
S. V.
,
1999
, “
Experimental optimization of confined air jet impingement on a pin-fin heat sink
,”
IEEE Trans. Compon. Packag. Technol.
,
22
, pp.
399
404
.
5.
El-Sheikh
,
H. A.
, and
Garimella
,
S. V.
,
2000
, “
Heat Transfer in Multiple Air Jet Impingement Using Pin-Fin Heat Sinks
,”
23
, pp.
113
121
.
6.
Schroeder
,
V. P.
, and
Garimella
,
S. V.
,
1998
, “
Heat transfer from a discrete heat source in confined air jet impingement
,”
Heat Transfer 1998
,
5
, pp.
451
456
.
7.
Obot
,
N. T.
, and
Trabold
,
T. A.
,
1987
, “
Impingement heat transfer within arrays of circular jets: Part 1-Effects of minimum, intermediate, and complete crossflow for small and large spacings
,”
ASME J. Heat Transfer
,
109
, pp.
872
879
.
8.
McGillis, W. R., and Carey, V. P., 1990, “Immersion cooling of an array of heat dissipating elements—An assessment of different flow boiling methodologies,” Cryogenic and Immersion Cooling of Optics and Electronic Equipment, ASME HTD-vol. 131, pp. 37–44.