Prediction of maximum spreading time of water droplet during impact onto hot surface beyond the Leidenfrost temperature

Illias, Suhaimi and Hussain, Suhaila and Abdul Rahim, Yuzairi and Baharudin, Mohamad Ezral and Ismail, Khairul Azwan and Ani, Mohd Hanafi and UNSPECIFIED (2021) Prediction of maximum spreading time of water droplet during impact onto hot surface beyond the Leidenfrost temperature. Case Studies in Thermal Engineering, 28. pp. 1-19.

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Abstract

When a water droplet impacts on a heated surface in the film boiling regime, it will spread, recede, and finally bounce off from the heated surface. These unique liquid-solid interactions only occur at high surface temperatures. Our main objective in this research is to measure the maximum spreading and residence time of the droplet and the findings were compared to theory. We focused our study in the film boiling regime. Brass material was selected as the test surface and was polished until it became a mirror polished surface. The temperature range for this experimental work was between 100 ◦C up to 420 ◦C. Degassed and distilled water was used as the test liquid. The high speed video camera recorded the images at the rate of 10,000 frames per second (fps). As a result, it was found that the experimental value of maximum spreading and esidence time agreed closely with the theoretical calculation. A new empirical formula that can be used to predict the maximum spreading time in the film boiling regime is also proposed.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Film boiling regime Maximum spreading Residence time Droplet impact High speed imaging analysis
Subjects:	T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Dr Mohd Hanafi Ani
Date Deposited:	09 May 2022 12:20
Last Modified:	09 May 2022 12:20
URI:	http://irep.iium.edu.my/id/eprint/97771

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