Journal of ILASS-Korea (한국분무공학회지)

Institute for Liquid Atomization and Spray Systems-Korea (한국분무공학회)
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Evaporation Characteristics of Paired Sessile Droplets on a Heated Substrate

가열된 표면에 고착된 한 쌍의 액적 증발 특성

  • 이형주 (중앙대학교 기계공학과) ;
  • 황원영 (중앙대학교 기계공학과) ;
  • 김정호 (중앙대학교 기계공학과) ;
  • 최창경 (중앙대학교 기계공학과) ;
  • 이성혁 (중앙대학교 기계공학부)
  • Received : 2023.06.09
  • Accepted : 2023.06.20
  • Published : 2023.09.30
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Abstract

This study investigates the evaporation characteristics of paired sessile droplets on a heated substrate. In particular, the evaporation time and contact line behaviors were analyzed based on the droplet-to-droplet distance and substrate temperature. The contact line behavior and volume variations were visualized using the shadowgraph method. It was observed that the contact diameter and contact angle exhibited similar behavior for both single and paired droplets regardless of the droplet-to-droplet distance and substrate temperature. The paired droplets demonstrated a longer evaporation time than the single droplet due to the vapor accumulation between the droplets. Furthermore, the scaled lifetime, defined as the ratio of evaporation time between paired and single droplets, increased as the droplet-to-droplet distance decreased and decreased as the substrate temperature increased, attributed natural convection.

Keywords

Acknowledgement

본 연구는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행한 연구임(No. NRF-2021R1A2C3014510). 또한, 본 연구는 산업통상자원부 에너지수요관리핵심기술개발사업의 일환으로 수행되었으며, 한국에너지기술평가원의 연구비 (과제번호: 20212020800270) 지원으로 이루어졌으며 이에 감사드립니다.

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