Thermal and Fluid Characteristics of Single Fin Heat Sink With a Piezoelectric Cooling Fan

Hsu, Heng-Pin; Cheng, Chao Chia; Li, Hung-Yi; Sheu, Tsung‐Sheng; Ay, Herchang

doi:10.1615/jflowvisimageproc.2018028199

Cited by 6 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Given an excitation voltage, the performance of a PE beam fan depends on the frequency and the amplitude of the oscillating beam [39][40][41]. When the beam has high flexural rigidity, the oscillation frequency is high, but the oscillation amplitude is low.…”

Section: Reciprocatingmentioning

confidence: 99%

Recent Developments in Air Pumps for Thermal Management of Electronics

Wen

2021

Journal of Electronic Packaging

View full text Add to dashboard Cite

For electronics, poor thermal management could cause severe mechanical and electrical failures. Forced convective air cooling, i.e., flowing air over a hot surface, is one of the most efficient and economical solutions to manage thermal issues of electronics. Air pump is used to initiate and sustain airflow required in forced convection. This paper reviews both the mechanical and the nonmechanical air pumps that have been using widely in current electronics or have a great potential in future electronics. The mechanical pumps include axial fans, blowers, beam fans, and diaphragm pumps, while the nonmechanical pump specifically focuses on electrohydrodynamic pumps. This paper presents the working principle first and then the recent developments, including the pump itself (design, characteristics, etc.) and the applications in thermal management (placement, integration, etc.). In the end, this paper conducts the strength analysis (flow rate, pressure, noise, flexibility, and reliability) among the reviewed five types of air pumps.

show abstract

Section: Reciprocatingmentioning

confidence: 99%

Recent Developments in Air Pumps for Thermal Management of Electronics

Wen

2021

Journal of Electronic Packaging

View full text Add to dashboard Cite

show abstract

“…The findings suggested that the thermal resistance of the fin array will not monotonically reduce with the increasing power. Hsu et al 22 measured the temperature profile on the pin-fin heat sink cooled by a vibrating piezo-fan. The results demonstrated that the piezo-fan can not only enhance the heat transfer by effectively directing the air inside the fins, but also may cause the boundary layer of the air flow to separate above the heat source, reducing the heat transfer performance.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigations on the thermal performance over corrugated surfaces with different wave shapes induced by piezoelectric fan

Zhang

Tan

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

In this paper, the thermal performance of the corrugated surfaces cooled with a piezoelectric fan was studied. A total of 25 corrugated surfaces with different wave shapes have been tested under different Re and gap heights ( G). The results showed that only the corrugated surface with the A/ WPF of 0.167 and T/ WPF of 0.533 produces the highest Nuarea values for all conditions, which is approximately 50% higher than that of a flat surface. It is confirmed that the corrugated shape is not only conducive to promoting the development of the vortex structure but also beneficial to increase the effective heat transfer area so that the overall heat transfer is optimal. An empirical correlation for estimating Nuarea on the hot corrugated surfaces was developed which has a mean absolute deviation of 11.0% and a mean relative deviation of 0.2%, predicting 75.9% of the entire database within a ±20% band. In addition, a corresponding simulation on the flow field revealed that the gap distance between adjacent wave crests is the key to balance the increasing effective heat transfer area and promoting the development of the vortex structure.

show abstract

“…4 Due to its advantages of simple structure, high reliability, low power consumption and minimal noise emission, forced air-cooling with piezoelectric fan is now a widely studied cooling technology in the electronic cooling applications. 5,6 A lot of researches have been devoted to reveal the flow performance induced by piezoelectric fan. It is illustrated that the streaming flow induced by a piezoelectric fan possesses vortical feature and the attainable flow rate is tightly dependent on the vibration parameters (such as vibration frequency, amplitude and mode shape), [7][8][9][10] its geometric parameters 8,[11][12][13] and operating environment.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the characteristics of turbulent flow and heat transfer induced by a vibrating piezoelectric fan on asymmetrical concave surfaces

Chen

2021

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

This paper aims at performing an investigation numerically on the turbulent flow and thermal performances for an asymmetrical concave surface integrated with a slim vibrating piezoelectric fan. The dynamic mesh technique using a user defined function to describe the displacement function of vibrating cantilever beam is employed to model the deformation of the slim piezoelectric fan in time. Meanwhile, the SST k-ω turbulence model is chosen to capture the turbulence behavior of the flow and heat transfer. Two important factors, the relative curvature of the both sides of semicircular surfaces ( RK) and the dimensionless distance of fan offset along y-axis (Δ y/ APP) are taken into considerations during the simulation process. A considerable increase of local time-average heat transfer coefficients is observed in the vicinity of vibration envelope. The results show that the relative curvature ( RK) has a strong influence on the flow and heat transfer at both ends of the asymmetrical concave surface when its value is larger than 2. And by adjusting the dimensionless offset distance of the piezoelectric fan (Δ y/ APP), the area-averaged convective heat transfer coefficient can be increased by 20% on a small zone surrounding the fan with WPF × App (S1). The conclusions of this paper implement a theoretical attempt for expanding the application scenarios of piezoelectric fan.

show abstract

Thermal and Fluid Characteristics of Single Fin Heat Sink With a Piezoelectric Cooling Fan

Cited by 6 publications

References 0 publications

Recent Developments in Air Pumps for Thermal Management of Electronics

Recent Developments in Air Pumps for Thermal Management of Electronics

Experimental and numerical investigations on the thermal performance over corrugated surfaces with different wave shapes induced by piezoelectric fan

Investigation of the characteristics of turbulent flow and heat transfer induced by a vibrating piezoelectric fan on asymmetrical concave surfaces

Contact Info

Product

Resources

About