Numerical and experimental investigations on effect of fan height on the performance of piezoelectric fan in microelectronic cooling

Abdullah, Moha Asri; Abdullah, M. Z.; Ramana, Maram Venkata; Khor, C. Y.; Ahmad, Khairul Azman; Mujeebu, M. Abdul; Ooi, Yew Hong; Ripin, Zaidi Mohd

doi:10.1016/j.icheatmasstransfer.2008.08.017

Cited by 45 publications

(15 citation statements)

References 8 publications

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“…They experience mechanical deformations when placed in an electric field, and become electrically polarized under mechanical loads and therefore, make them appropriate for a variety of electromechanical systems used for vibration and noise control [1][2][3], energy harvesting [4], cooling devices [5], telecommunication, and sensor networks [6]. With the development of the material technology, piezoelectric materials have been employed in micro/nano structures such as, micro/nano electromechanical systems (MEMS/NEMS) [7], nanoresonators [8], chemical sensors [9] and biosensors [10].…”

Section: Introductionmentioning

confidence: 99%

On the buckling behavior of piezoelectric nanobeams: An exact solution

Jandaghian

Rahmani

2015

J Mech Sci Technol

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In this paper, thermoelectric-mechanical buckling behavior of the piezoelectric nanobeams is investigated based on the nonlocal theory and Euler-Bernoulli beam theory. The electric potential is assumed linear through the thickness of the nanobeam and the governing equations are derived by Hamilton's principle. The governing equations are solved analytically for different boundary conditions. The effects of the nonlocal parameter, temperature change, and external electric voltage on the critical buckling load of the piezoelectric nanobeams are discussed in detail. This study should be useful for the design of piezoelectric nanodevices.

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Section: Introductionmentioning

confidence: 99%

On the buckling behavior of piezoelectric nanobeams: An exact solution

Jandaghian

Rahmani

2015

J Mech Sci Technol

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“…On the other hand, even applications with lower heat dissipation levels could pose severe challenges due to space, weight, power consumption, noise level, or other constraints [9]; for instance, the more the heat generated the larger, faster and noisier is the fan needed to remove it. One of the techniques proposed over the last decade to cope up with this issue is piezoelectric fan [10][11][12][13].…”

Section: List Of Symbols D Pzmentioning

confidence: 99%

Effects of tip gap and amplitude of piezoelectric fans on the performance of heat sinks in microelectronic cooling

et al. 2011

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Piezoelectric fan is a promising option for cooling microelectronic devices owing to its unique features such as no electromagnetic noise, low power consumption and minimum space requirement. The recent interest is to integrate the piezoelectric fans (piezofans) with heat sink; this idea is widely accepted and researches are still underway. This article presents experimental analysis on the effects of tip gap (d) and amplitude of piezofan vibration (a) on the heat transfer characteristics of finned heat sinks. Two heat sink configurations, namely A and B (with two and four fins respectively) each of which is arranged with three piezofans, are considered for the study. The transient temperature distributions for cases with and without piezofans are obtained for both the configurations, and compared. The heat transfer coefficient, thermal impedance, Nusselt number and Reynolds number are investigated as functions of d and a. The effect of a on the fan effectiveness is also analyzed. It is observed that the configuration B has better cooling performance compared to A. Among the tested ranges of d and a, the case with least tip gap (d = 0.03) and highest amplitude (a = 5.29) is found to be the best; at this setting, the fan effectiveness is increased to almost 4 times compared to the case without piezofans.

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“…Since then, many studies experimentally examined the performance of heat transfer enhancement under the actuation of a piezofan [3][4][5][6][7]. Some numerical studies were performed to investigate the flow fields and heat transfer performance of piezofans [8][9][10][11][12][13][14][15][16]. Their results revealed that the average maximum heat transfer augmentation and local maximum heat transfer augmentation can be increased by about 100% and 350%, respectively.…”

Section: Introductionmentioning

confidence: 99%

A Study of an Effective Heat-Dissipating Piezoelectric Fan for High Heat Density Devices

Lin

Jang

Leu³

2016

Energies

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Abstract:Heat dissipation per unit volume has grown rapidly, as the size of modern electronic devices has continued to decrease. The air flow induced by an oscillating cantilever blade enhances the heat transfer performance of high heat density devices. The heat transfer improvement mainly depends on the velocity magnitude and distribution of air streams induced by the vibrating blade. Accordingly, this study numerically and experimentally examines the time-varying flow characteristics of a vibrating cantilever for five blade types. The blades are rectangular or trapezoidal with various widths and actuated at various frequencies. The fluid domain is numerically discretized using a dynamic meshing scheme to model the three-dimensional time-varying vibrating blade. The experiment utilizes nine hot-wire velocity meters to measure the average velocities. The flow structure with streamlines and velocity contours of the induced air flow are determined at various section planes. The results show that a major maximum-velocity region appears around the blade tip and that four minor local-maximum-velocity regions appear at the four corners. In addition, the width and width ratio of the blade significantly affects the velocity distribution of the flow induced by the vibrating cantilever blade.

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Numerical and experimental investigations on effect of fan height on the performance of piezoelectric fan in microelectronic cooling

Cited by 45 publications

References 8 publications

On the buckling behavior of piezoelectric nanobeams: An exact solution

On the buckling behavior of piezoelectric nanobeams: An exact solution

Effects of tip gap and amplitude of piezoelectric fans on the performance of heat sinks in microelectronic cooling

A Study of an Effective Heat-Dissipating Piezoelectric Fan for High Heat Density Devices

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