Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Microscale Heat Transfer Enhancement by Acoustic Streaming Flow

음향흐름유동 기반 마이크로 스케일 열전달 성능 향상

  • Jeongu Ko (Department of Mechanical Engineering, Chonnam National University) ;
  • Jinsoo Park (Department of Mechanical Engineering, Chonnam National University)
  • Received : 2024.06.20
  • Accepted : 2024.07.22
  • Published : 2024.07.31
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Abstract

As micro-electronic devices are getting miniaturized, technology that can manage the temperature of confined area is required. On these demands, microchannel heat exchanger is suggested as promising solution. However, due to laminar flow created inside the microchannel with high Reynolds number suppresses diffusion based natural convection, leads to low heat transfer performance of microchannel. This paper shows how acoustic streaming flow enhances the heat transfer performance inside the microchannel without using additional structure or nanoparticle inside the straight microchannel and fluid numerically. Various parameters, such as Reynolds number (Re), initial displacement (ξ) was adopted to evaluate the influence of acoustic streaming flow. The results showed that acoustic streaming flow can disturb the thermal boundary, by creating the micro-vortex inside the straight-microchannel and enhance the heat transfer performance.

Keywords

Acknowledgement

This research was financially supported by the Ministry of Small and Medium-sized Enterprises (SMEs) and Startups (MSS), Korea, under the "Regional Specialized Industry Development Plus Program (R&D, S3401805)" supervised by the Korea Technology and Information Promotion Agency (TIPA) for SMEs. The microfluidic devices were fabricated by using a mask aligner (MDA-400S, MIDAS) at Energy Convergence Core Facility in Chonnam National University.

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