Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32759
Numerical and Experimental Study of Heat Transfer Enhancement with Metal Foams and Ultrasounds

Authors: L. Slimani, A. Bousri, A. Hamadouche, H. Ben Hamed

Abstract:

The aim of this experimental and numerical study is to analyze the effects of acoustic streaming generated by 40 kHz ultrasonic waves on heat transfer in forced convection, with and without 40 PPI aluminum metal foam. Preliminary dynamic and thermal studies were done with COMSOL Multiphase, to see heat transfer enhancement degree by inserting a 40PPI metal foam (10 × 2 × 3 cm) on a heat sink, after having determined experimentally its permeability and Forchheimer's coefficient. The results obtained numerically are in accordance with those obtained experimentally, with an enhancement factor of 205% for a velocity of 0.4 m/s compared to an empty channel. The influence of 40 kHz ultrasound on heat transfer was also tested with and without metallic foam. Results show a remarkable increase in Nusselt number in an empty channel with an enhancement factor of 37,5%, while no influence of ultrasound on heat transfer in metal foam presence.

Keywords: Enhancing heat transfer, metal foam, ultrasound, acoustic streaming, laminar flow.

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 417

References:


[1] Eckart, C., Vortices and Streams Caused by Sound Waves. Physical Review, 1948. 73(1): p. 68-76.
[2] Wiklund, M., R. Green, and M. Ohlin, Acoustofluidics 14: Applications of acoustic streaming in microfluidic devices. Lab on a Chip, 2012. 12(14): p. 2438-2451.
[3] Po, P. and B.-G. Loh, Feasibility of using ultrasonic flexural waves as a cooling mechanism. IEEE Transactions on Industrial Electronics, 2001. 48(1): p. 143-150.
[4] Loh, B.-G., et al., Acoustic streaming induced by ultrasonic flexural vibrations and associated enhancement of convective heat transfer. The Journal of the Acoustical Society of America, 2002. 111(2): p. 875-883.
[5] Loh, B.-G., D.-R. Lee, and K. Kwon, Acoustic streaming pattern induced by longitudinal ultrasonic vibration in an open channel using particle imaging velocimetry. Applied physics letters, 2006. 89(18): p. 183505.
[6] Lee, D.-R. and B.-G. Loh, Smart cooling technology utilizing acoustic streaming. IEEE Transactions on components and Packaging technologies, 2007. 30(4): p. 691-699.
[7] Monnot, A., et al. Conception et étude préliminaire d'un échangeur de chaleur tubes et calandres assisté par Ultrasons. in CFM 2007. 2007.
[8] Gondrexon, N., et al., Intensification of heat transfer process: improvement of shell-and-tube heat exchanger performances by means of ultrasound. Chemical Engineering and Processing: Process Intensification, 2010. 49(9): p. 936-942.
[9] Rahimi, M., M. Abolhasani, and N. Azimi, High frequency ultrasound penetration through concentric tubes: illustrating cooling effects and cavitation intensity. Heat and Mass Transfer, 2015. 51(4): p. 587-599.
[10] Bulliard-Sauret, O., et al., Heat transfer enhancement using 2 MHz ultrasound. Ultrasonics sonochemistry, 2017. 39: p. 262-271.
[11] Kamath, P.M., C. Balaji, and S. Venkateshan, Convection heat transfer from aluminium and copper foams in a vertical channel–An experimental study. International Journal of Thermal Sciences, 2013. 64: p. 1-10.
[12] Dyga, R. and M. Płaczek, Heat transfer through metal foam–fluid system. Experimental thermal and fluid science, 2015. 65: p. 1-12.
[13] Hamadouche, A., et al., Experimental investigation of convective heat transfer in an open-cell aluminum foams. Experimental Thermal and Fluid Science, 2016. 71: p. 86-94.
[14] Moroney, R., R. White, and R. Howe. Ultrasonically induced microtransport. in Micro Electro Mechanical Systems, 1991, MEMS'91, Proceedings. An Investigation of Micro Structures, Sensors, Actuators, Machines and Robots. IEEE. 1991. IEEE.