NUMERICAL AND EXPERIMENTAL INVESTIGATION OF EVAPORATION CHARACTERISTICS OF A SESSILE WATER DROPLET ON A HEATED SUBSTRATE


Yılmaz M., Saitoğlu E. E. , Yıldırım A. , Sevindir M. K.

6th International Conference on Advances in Mechanical Engineering, İstanbul, Turkey, 20 October 2021, pp.681-689

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.681-689
  • Yıldız Technical University Affiliated: Yes

Abstract

Sessile droplet evaporation is a significant subject of research that has a variety of applications in the industry.  In this paper we were carried out in support of a research project on the enhancement and development of drying processes. Sessile droplet evaporation was studied experimentally and numerically. The initial contact angle was validated with mathematical formulas published in the literature as a result of observations obtained utilizing static contact angle measurement methods in an experiment done on a 60°C aluminum plate. A high-speed camera was used to video record the evaporation process of the droplet, whose initial contact angle was mathematically confirmed. In 150 seconds, the droplet on the 60°C aluminum plate evaporated, and contact angles were determined every 20 seconds. Numerical analysis using the ANSYS/Fluent package program, contact angles obtained in the images collected at the 20th and 40th seconds were verified by experimental study. Consequently, the literature has validated the initial contact angle, and numerical simulations have confirmed the time-varying contact angle. The characteristics of droplet evaporation on hydrophilic surfaces have been investigated intensively using this method.