Browse > Article

A Novel Cooling Method by Acoustic Streaming Induced by Ultrasonic Resonator  

노병국 (대구가톨릭대학교 기계자동차 공학부)
이동렬 (대구가톨릭대학교 기계자동차 공학부)
Publication Information
The Journal of the Acoustical Society of Korea / v.22, no.3, 2003 , pp. 217-223 More about this Journal
Abstract
A novel cooling method induced by acoustic streaming generated by ultrasonic vibration at 30㎑ is presented. Ultrasonic vibration is obtained by piezoelectric devices and the maximum vibration amplitude of 50 m is achieved by including a horn, mechanical vibration amplifier in the system and making the complete system resonate. To investigate the enhancement of heat transfer capability of acoustic streaming, the temperature variations of heat source and air in the vicinity of heat source are measured in real-time. It is observed that acoustic streaming is instantly induced by ultrasonic vibration, resulting in the significant temperature drop due to the bulk air flow caused by acoustic streaming. In addition, it is observed that the cooling effect on the heat source is maximized when the gap between the ultrasonic vibrator and heat source coincides with the multiples of half-wavelength of the ultrasonic wave. This fact results from the resonance of the sound wave. The theoretical analysis of the dependence on the gap is also accomplished and verified by experiment. The advantage of the proposed cooling method by acoustic streaming is noise-free due to the ultrasonic vibration and maintenance-free because of the absence of moving parts. Moreover. This cooling method can be utilized to the nano and micro-electro mechanical systems, where the fan-based conventional cooling method can not be employed.
Keywords
Ultrasonic vibration; Acoustic streaming; Heat transfer; Resonance; Cooling;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Outer acoustic streaming /
[ C.P.Lee;T.G.Wang ] / J. of Acoust. Soc. Am.
2 Acoustic streaming near a Boundary /
[ W.L.Nyborg ] / J.of Acoust. Soc. Am.
3 Heat transfer to cylindrical bodies and small particles in an ultrasonic standing-wave fields of melt atomizer /
[ V.Uhlenwinkel;R.Meng;K.Bauckhage;P.Schreckenber;O.Andersen ] / Multiphase-Flow and Heat Transfer in Materials Processing ASME
4 Acoustic streaming /
[ J.Lighthill ] / J. of Sound and Vib.   ScienceOn
5 /
[ M.F.Hamilton;D.T.Blockstock ] / Nonlinear Acoustics
6 Acoustic enhancement of heat transfer between two parallel plates /
[ P.Vainshtein;M.Fichman;C.Cutfinger ] / Int. J. Heat & Mass Transfer.   ScienceOn
7 Convective heat transfer from a sphere due to acoustic streaming /
[ A.Gopinath;F.Mills ] / J. of Heat Transter   ScienceOn
8 /
[ Rayleigh ] / Theory of Sound
9 Acoustic streaming at high reynolds numbers /
[ J.M.Andres;U.Ingard ] / J. of Acoust. Soc. Am.
10 /
[ H.Schicting ] / Boundary Layer Theory
11 Convective heat transfer due to acoustic streaming across the ends of kundt tube /
[ A.Gopinath;F.Mills ] / Journal of Heat Transfer   ScienceOn
12 Acoustic streaming induced by ultrasonic flexural vibrations and associated enhancement of convective heat transfer /
[ B.Loh;S.Hyun;P.Ro;C.Kleinstreuer ] / J. of Acoust. Soc. Am.   ScienceOn
13 /
[ M.Faraday ] / Phil. Trans.
14 /
[ T.Sashida ] / An Introduction to Ultrasonic Motors
15 Feasibility of using Ultrasonic Flexural waves as a cooling Mechanism /
[ P.I.Ro;B.Loh ] / IEEE Industrial Elcetronics