Journal
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
Volume 29, Issue 6, Pages 2401-2407Publisher
KOREAN SOC MECHANICAL ENGINEERS
DOI: 10.1007/s12206-015-0532-0
Keywords
Contact angle hysteresis; Droplet evaporation; Level-set method; Mass transfer
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Funding
- National Research Foundation of Korea (NRF) - Korean government (MSIP) [2013R1A2A2A01068333]
- National Research Foundation of Korea [2013R1A2A2A01068333] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Numerical simulation is performed for droplet evaporation between two circular plates. The flow and thermal characteristics of the droplet evaporation are numerically investigated by solving the conservation equations of mass, momentum, energy and mass fraction in the liquid and gas phases. The liquid-gas interface is tracked by a sharp-interface level-set method which is modified to include the effects of evaporation at the liquid-gas interface and contact angle hysteresis at the liquid-gas-solid contact line. An analytical model to predict the droplet evaporation is also developed by simplifying the mass and vapor fraction equations in the gas phase. The numerical results demonstrate that the 1-D analytical prediction is not applicable to the high rate evaporation process. The effects of plate gap and receding contact angle on the droplet evaporation are also quantified.
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