Research Papers

Steady and Unsteady Air Impingement Heat Transfer for Electronics Cooling Applications

[+] Author and Article Information
Mehmet Arik

Faculty of Engineering,
Department of Mechanical Engineering,
Ozyegin University Cekmekoy,
34782 Istanbul, Turkey
e-mail: mehmet.arik@ozyegin.edu.tr

Rajdeep Sharma

Exponent Inc.,
Menlo Park, CA 94025

Xin He

National Renewable Energy Laboratory,
Golden, CO 80401

Contributed by the Heat Transfer Division of ASME for publication in the Journal of Heat Transfer. Manuscript received April 25, 2012; final manuscript received December 22, 2012; published online September 23, 2013. Assoc. Sujoy Kumar Saha.

J. Heat Transfer 135(11), 111009 (Sep 23, 2013) (8 pages) Paper No: HT-12-1188; doi: 10.1115/1.4024614 History: Received April 25, 2012; Revised December 22, 2012

This paper focuses on two forced convection methods—steady jet flow and pulsating flow by synthetic jets—that can be used in applications requiring significant amounts of heat removal from electronics components. Given the dearth of available data, we have experimentally investigated steady jets and piezoelectrically driven synthetic jets that provide pulsating flow of air at a high coefficient of performance. To mimic a typical electronics component, a 25.4-mm × 25.4-mm vertical heated surface was used for heat removal. The impingement heat transfer, in the form of Nusselt number, is reported for both steady and unsteady jets over Reynolds numbers from 100 to 3000. The effect of jet-to-plate surface distance on the impingement heat transfer is also investigated. Our results show that synthetic jets can provide significantly higher cooling than steady jets in the Reynolds number range of 100 to 3000. We attribute the superior performance of synthetic jets to vortex shedding associated with the unsteady flow.

Copyright © 2013 by ASME
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Petroski, J., Arik, M., and Gursoy, M., 2008, “Piezoelectric Fans: Heat Transfer Enhancements or Electronics Cooling,” ASME-JSME Thermal Engineering and Summer Heat Transfer Conference 2008, Jacksonville, FL, Aug. 10–14, HT-2008-56405.
Açikalin, T., Sauciuc, I., and Garimella, S. V., 2005, “Piezoelectric Actuators for Low-Form-Factor Electronics Cooling,” The ASME/Pacific Rim Technical Conference and Exhibition on Integration and Packaging of Micro, Nano, and Electronic Systems (InterPACK’05), San Francisco, July 17–22, IPACK2005-73288.
Arik, M., 2008, “Local Heat Transfer Coefficients of a High Frequency Synthetic Jets During Impingement Cooling Over Flat Surfaces,” Heat Transfer Eng., 29(9) pp. 763–773. [CrossRef]
Lee, C. Y., and Glodstein, D. B., 2001, “DNS of Micro Jets for Turbulent Boundary Layer Control,” AIAA 39th Aerospace Sciences Meeting and Exhibition, Reno, NV, AIAA Paper No. 2001-1013.
Garg, J., Arik, M., Weaver, S., and Saddoughi, S., 2004, “Micro Fluidic Jets for Thermal Management of Electronics,” Proceedings of ASME Heat Transfer/Fluids Engineering Summer Conference, Charlotte, NC, July 11–15, FED F-346.
Erbas, N., Koklu, M., and Baysal, O., 2005, “Synthetic Jets for Thermal Management of Microelectronic Chips,” Proceedings of ASME IMECE 2005, Orlando, FL, IMECE 2005-81419.
Seeley, C. E., Arik, M., Hedeen, R., Utturkar, Y., Wetzel, T., and Shih, M., 2006, “Coupled Acoustic and Heat Transfer Modeling of A Synthetic Jet,” 47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Newport, RI, May 1–4, pp. 1–13.
Arik, M., Petroski, J., Bar-Cohen, A., and Demiroglu, M., 2007, “Energy Efficiency of Low Form Factor Cooling Devices,” ASME International Mechanical Engineering Congress and Exposition, Nov. 11–15, Seattle, WA, IMECE2007-41275.
Gutmark, E., Yassour, Y., and Wolfshtein, M., 1982, “Acoustic Enhancement of Heat Transfer in Plane Channels,” Proceedings of the Seventh International Heat Transfer Conference, Munich, Germany, Sep. 6–10, pp. 441–445.
Yassour, Y., Stricker, J., and Wolfshtein, M., 1986, “Heat Transfer from a Pulsating Jet,” Proceedings of the Eighth International Conference, San Francisco, CA, Aug. 17–22, Vol. 3, pp. 1183–1186.
Minichiello, A. L., Hartley, J. G., Glezer, A., and Black, W. Z., 1997, “Thermal Management of Sealed Electronic Enclosures Using Synthetic Jet Technology,” Adv. Electron. Packag., 19(2), pp. 1809–1812.
Utturkar, Y., Arik, M., and Gursoy, M., 2006, “An Experimental and Computational Sensitivity Analysis of Synthetic Jet Cooling Performance,” IMECE2006 ASME International Mechanical Engineering Congress and Exposition, Chicago, IL, Nov. 5–10, IMECE2006-13743.
Garg, J., Arik, M., Weaver, S., Wetzel, T., and Saddoughi, S., 2005, “Advanced Localized Air Cooling With Synthetic Jets,” ASME J. Electron. Packag., 127, pp. 503–5115. [CrossRef]
Arik, M., Utturkar, Y., and Gursoy, M., 2007, “Interaction of Synthetic Jet Cooling Performance With Gravity and Buoyancy Driven Flows,” ASME InterPACK’07, Vancouver, British Columbia, Canada, July 8–12.
Arik, M., 2007, “An Investigation Into Feasibility of Impingement Heat Transfer and Acoustic Abatement of Meso Scale Synthetic Jets,” Appl. Therm. Eng., 27(8-9), pp. 1483–1494. [CrossRef]
Martin, H., 1977, “Heat and Mass Transfer between Impinging Gas Jets and Solid Surface,” Adv. Heat Transfer, 13, pp. 1–60. [CrossRef]
Jambunathan, K., Lai, E., Moss, M. A., and Button, B. L., 1992, “A Review of Heat Transfer Data for Single Circular Jet Impingement,” Int. J. Heat Fluid Flow, 13(2), pp. 106–115. [CrossRef]
Glynn, C., and Murray, D. B., 2005, “Jet Impinging Cooling in Microscale,” ECI International Conference on Heat Transfer and Fluid Flow in Microscale, Castelvecchio Pascoli, Sep. 25–30.
Lin, Z. H., Chou, Y. J., and Hung, Y. H., 1997, “Heat Transfer Behaviors of a Confined Slot Jet Impingement,” Int. J. Heat Mass Transfer, 40(5), pp. 1095–1107. [CrossRef]
Katti, V., and Prabhu, S. V., 2008, “Experimental Study and Theoretical Analysis of Local Heat Transfer Distribution Between Smooth Flat Surface and Impinging Air Jet From a Circular Straight Pipe Nozzle,” Int. J. Heat Mass Transfer, 51, pp. 4480–4495. [CrossRef]
Nirmalkumar, M., Katti, V., and Prabhu, S. V., 2011, “Local Heat Transfer Distribution on a Smooth Flat Plate Impinged by a Slot Jet,” Int. J. Heat Mass Transfer, 54, pp. 727–738. [CrossRef]
Sagot, B., Antonini, G., Christgen, A., and Buron, F., 2008, “Jet Impingement Heat Transfer on a Flat Plate at a Constant Wall Temperature,” Int. J. Therm. Sci., 47, pp. 1610–1619. [CrossRef]
Zhou, D. W., and Lee, S.-J., 2007, “Forced Convective Heat Transfer With Impinging Rectangular Jets,” Int. J. Heat Mass Transfer, 50, pp. 1916–1926. [CrossRef]
Choo, K. S., Youn, Y. J., Kim, S. J., and Lee, D. H., 2009, “Heat Transfer Characteristics of a Micro-scale Impinging Slot Jet,” Int. J. Heat Mass Transfer, 52, pp. 3169–3175. [CrossRef]
Choo, K. S., and Kim, S. J., 2009, “Air Jet Impingement Heat Transfer at Low Nozzle-to-Plate Spacings Under a Fixed Pumping Power Condition,” Proceedings of the ASME 2009 Heat Transfer Summer Conference, HT2009-88189.
Schroeder, V. P., and Garimella, S. V., 1998, “Heat Transfer From a Discrete Heat Source in Confined Air Jet Impingement,” Proceedings of 11th IHTC, 5, pp. 451–456.
Lee, J., and Lee, S.-J., 2000, “The Effect of Nozzle Configuration on Stagnation Region Heat Transfer Enhancement of Axisymmetric Jet Impingement,” Int. J. Heat Mass Transfer, 43, pp. 3497–3509. [CrossRef]
Pan, Y., Stevens, S., and Webb, B. W., 1992, “Effect of Nozzle Configuration on Transport in the Stagnation Zone of Axisymmetric Impinging Free Surface Liquid Jets: Part 2—Local Heat Transfer,” ASME J. Heat Transfer, 114, pp. 880–885. [CrossRef]
Brignoni, L. A., and Garimella, S. V., 2000, “Effects of Nozzle-Inlet Chamfering on Pressure Drop and Heat Transfer in Confined Air Jet Impingement,” Int. J. Heat Mass Transfer, 43, pp. 1133–1139. [CrossRef]
Koseoglu, M. F., and Baskaya, S., 2010, “The Role of Jet Inlet Geometry in Impinging Jet Heat Transfer, Modeling and Experiments,” Int. J. Therm. Sci.49, pp. 1417–1426. [CrossRef]
Gulati, P., Katti, V., and Prabhu, S. V., 2009, “Influence of Nozzle Shape on Local Heat Transfer Distribution Between Flat Surface and Impinging Air Jet,” Int. J. Therm. Sci., 48, pp. 602–617. [CrossRef]
Mittal, R., and Rampunggoon, P., 2002, “On Virtual Aero-Shaping Effect of Synthetic Jets,” Phys. Fluids, 14(4), pp. 1533–1536. [CrossRef]
Arik, M., and Icoz, T., 2012, “Predicting Heat Transfer From Unsteady Synthetic Jets,” ASME J. Heat Transfer, 134, p. 081901. [CrossRef]
Moffat, R. J., 1988, “Describing the Uncertainties in Experimental Results,” Exp. Therm. Fluid Sci., 1, pp. 3–17. [CrossRef]
Dieck, R. H., Steele, W. G., and Osolsobe, G., 2005, “Test Uncertainty,” American Society of Mechanical Engineers, New York, ASME PTC 19.1-2005.


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Fig. 1

Typical operation of a synthetic jet; synthetic jets shown from top view

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Fig. 2

Synthetic jet test setup (photo credit: Mr. Sitki Ulcay)

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Fig. 3

Close up (oblique) view of synthetic jet and the vertical heater (photo credit: Mr. Sitki Ulcay)

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Fig. 4

Hot-wire probe positioned in front of the jet orifice (photo credit: Mr. Tunc Icoz GE GRC)

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Fig. 5

Variation of instantaneous jet exit velocities for 8 mm jet at 60 V and 600 Hz

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Fig. 6

Schematic of the steady jet experimental setup. 1-compressed air, 2-desiccant dryer, 3-filter/regulator, 4-mass flow controller, 5-plate heat exchanger, 6-recirculating bath, 7-laminar flow element, 8-settling chamber, 9-nozzle, 10-heater target, 11-heater power supply, 12-isolation box

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Fig. 7

Steady jet experimental setup at NREL laboratory (photo credit: Jason A. Lustbader, NREL)

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Fig. 8

Comparison of synthetic jet experiments performed at GE GRC and NREL laboratories for the same jet

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Fig. 9

Nusselt number versus Reynolds number characteristic for synthetic and steady jet (S/Dh = 5)

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Fig. 10

Nusselt number versus Reynolds number characteristic for synthetic and steady jet (S/Dh = 10)

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Fig. 11

Nusselt number versus Reynolds number characteristic for synthetic and steady jet (S/Dh = 15)

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Fig. 12

Nusselt number versus Reynolds number characteristic for synthetic and steady jet (S/Dh = 20)

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Fig. 13

Nusselt number versus S/Dh for steady jet

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Fig. 14

Nusselt number versus S/Dh for synthetic jet



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