Moving-orientation and position effects of the piezoelectric fan on thermal characteristics of the heat sink partially filled in a channel with axial flow

A review of piezoelectric fans for low energy cooling of power electronics

“…Jeng and Liu [51] found, considering the setup shown in Figure 16c, that a square pinned heat sink facilitates greater heat transfer, compared to a conventional finned heat sink. Heat transfer enhancement is most substantial when the Reynold's number of the channel airflow is smallest, because of the relative increase in turbulence.…”

Thermal Analysis of Radial Piezoelectric-Magnetic Fan (RPMF) for Electronics Cooling

“…Therefore, the amount of amplitude at optimum resonant frequency should be obtained. From other side, the orientation of the fan with respect to the heat source (Jeng & Liu, 2015) also varies the amount of air flow to the heated surface. Jeng & Liu (2015) studied on transverse and axial fan oscillation whose claimed that transverse oscillation gives more heat transfer whereas (Liu, Huang, Sheu, & Wang, 2009) whose studied on vertical and horizontal fan position found that vertical arrangement has higher effectiveness of heat rejection.…”

The role of housing design in a multiple fans system with a piezoelectric actuator

“…Shyu et al [21] developed the finger-like piezoelectric fan, which is comprised of four flexible rectangular blades to enhance the cooling efficiency. Jeng et al [22] experimentally investigated the heat transfer characteristics of different heat sink designs when the piezoelectric fan was applied for cooling. The results indicated that the oscillating movement of the piezoelectric fan did strengthen the turbulent intensity of the mainstream at low Reynolds number to cause additional disturbance.…”