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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

SYNTHETIC JET FORCED CONVECTION HEAT TRANSFER ENHANCEMENT IN MICRO-CHANNELS

Get access (open in a dialog) DOI: 10.1615/IHTC13.p14.210
13 pages

要約

The effect of a synthetic jet on heat transfer rates in forced convection of water in micro-channels etched in the rear side of the silicon substrate has been studied numerically. A heat flux of 1 MWm−2 was applied at the surface of the top of a silicon wafer and the resulting conjugate heat transfer through the silicon substrate was included in the calculations. Since the flow in the synthetic jet generator is unsteady, the numerical calculations simulated these transient conditions. Because of the large computer recourses required two-dimensional calculations were performed.
Two different locations of synthetic jet actuators have been studied; one near the entrance and the other at the centre of the channel. The calculations were started from the same results obtained with steady flow in the channel. 31 full cycles of the actuator were simulated in each case. When the actuators are switched on, there is a significant decrease in the temperature at all points in the substrate from those which existed when there was a steady water flow in the channel. Although the average temperature of the silicon substrate is not greatly affected by the position of the orifice of the synthetic jet, however, the maximum and minimum temperatures are significantly different. When the orifice is at the centre, the disparity between these two temperatures is approximately half that when the orifice is near the entrance of the channel.