Proceedings of the
International Conference on Mechanical Engineering 2009
(ICME2009) 26- 28 December 2009, Dhaka, Bangladesh

ICME09-TH-17

EXPERIMENTAL INVESTIGATION OF SESSILE DROP
EVAPORATION AND ITS RELATION WITH LEIDENFROST
TEMPERATURE

A.K. Mozumder, M.R. Ullah and A. Hossain
Department of Mechanical Engg, Bangladesh University of Engineering and Technology (BUET)
Dhaka, Bangladesh.

ABSTRACT

This study experimentally investigates the evaporation of sessile drop for four different heated surfaces of Aluminum, Brass, Copper and Mild steel with a combination of four different liquids as Methanol, Ethanol, Water and NaCl solution. The metallic surfaces were polished with a zero grade emery paper and are electrically heated upto temperatures varied from 100 to 400 oC with an increment of 25 oC. The time of evaporation for the droplet on the hot metallic surface was measured. According to the experimental data, the Leidentfrost temperature is within a range of 150 to 200 oC for all the experimental conditions. Sessile drop evaporation time is the maximum for water, then decreases gradually for Nacl solution, Methanol and is the minimum for ethanol for a particular solid material. On the other hand, this time is the highest for copper and the lowest for mild steel for a specific liquid.

Keywords: Evaporation, Sessile Drop, Conduction.

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