Heat Transfer Analysis of Plate-fin Heat Sink with Piezoelectric Fan

Abstract

Applying software Ansys-Fluent to analysis the effect of piezoelectric fan device installed inside rectangular channel by numerical simulation method. The piezoelectric fan is activated by reversible piezoelectric effect in piezoelectric material, change rectangular channel flow field construction, then it affects heat flow status in advance. Numerical simulation parameter are included Nusselt number (Nu), distance between peak of fan blades to front part of heat sink (L g =0, 5, 10, -11.25, -22.5, -33.75, -45), height from center on piezoelectric fan bottom side (H w =10, 16, 21), number of piezoelectric fan (single-fan and twin-fan), phase-shift (in-phase and counter-phase), and numbers (n=10, 14) for heat sink fin. This result is indicated that good position to temperature dropped greatly is located from the front part of piezoelectric fan to the front of heat sink (L g = -22.5) under fixes distance (H w = 21) from piezoelectric fan to channel also found to provide double piezoelectric fan heat drop effect is equal to single one, however, double piezoelectric fans would provide higher heat dissipation as Counter-phase. The performance of piezoelectric fan is improved depends on change height (H w ) from center of piezoelectric fan to channel bottom; the height (H w ) shall be decreased as piezoelectric fan placement at the front of heat sink.