The numerical study of thermal flow characteristics for single and dual piezoelectric fans horizontally placed on rectangular channel

The purpose of this study was to use computational fluid dynamics software Fluent, the numerical simulation to discuss the impact pressure within the flow channel device for flat radiator fan heat flow characteristics. Piezoelectric fan was placed in front of the flow channel, and the cold air flow was introduced to the radiator cooling fan, and thus generated vortex fluid in the flow path around the radiator to enhance the mixing of hot and cold fluid. Numerical simulation of various parameters were including the front ends of piezoelectric fan to the front ends of radiator (Lg), the height from piezoelectric fan to the bottom of the rectangular channel (Hw), and the number of fins (n), dual-piezoelectric fans, one was in the same direction and the other was in 180Phase delay. The results showed that the dual-piezoelectric fans installed in the flow channel can effectively enhance the Nusselt value of plate-type radiator. As the height (Hw) of single and dual piezoelectric fans was 15mm, and distance to the front of the radiator (Lg) was 5mm and at dualpiezoelectric fan space (a) was 20mm, the Nusselt value of this installation location had best result. And as Fin number was 10 and 14, the fin number 10 was superior to fin number 14, because thermal performance in the larger space of channel had better thermal performance.