Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Effect of the Droplet Volume on the Evaporative Characteristics of Sessile Droplet

액적 체적이 증발 특성에 미치는 영향에 관한 수치해석 연구

  • 정찬호 (중앙대학교 기계공학과) ;
  • 이형주 (중앙대학교 기계공학과) ;
  • 김홍석 (중앙대학교 기계공학과) ;
  • 이성혁 (중앙대학교 기계공학부)
  • Received : 2021.06.02
  • Accepted : 2021.06.14
  • Published : 2021.06.30
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Abstract

This study aims to investigate the influence of the droplet volume on the evaporation characteristics of the sessile droplet. In particular, the effect of the free convection in the vapor domain on the evaporation rate was analyzed through the numerical simulation. The commercial code of the ANSYS Fluent (V.2020 R2) was used to simulate the heat transfer in the liquid-vapor domain. Moreover, we used the diffusion model to estimate the evaporation rate for the different droplet volume under the room temperature. It was found that the evaporation rate significantly increases with the droplet volume because of the larger surface area for the mass transfer. Also, the effect of free convection on the evaporation rate becomes significant with an increment of droplet volume owing to the increase in the droplet radius corresponding to the characteristic length of the free convection.

Keywords

Acknowledgement

본 연구는 정부(미래창조과학부)의 재원으로 한국연구재단 (No. NRF-2021R1A2C3014510)의 지원을 받아 수행하였습니다.

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