Suhaila Hussain
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Preferred name
Suhaila Hussain
Official Name
Suhaila, Hussain
Alternative Name
Hussain, S.
Suhaila, H.
Main Affiliation
Scopus Author ID
7403344616
Researcher ID
CVK-1894-2022

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Critical heat flux and Leidenfrost temperature on Electrical Discharge Machining (EDM) - constructed hemispherical surface

2021 , Suhaimi Illias , Suhaila Hussain , Rosman N.A. , Mohamad Ezral Baharudin , Mohamad Shaiful Ashrul Ishak , Khirul Azwan Ismail , Mohd Hanafi Ani

This paper reports a Leidenfrost temperature on hemispherical surface constructed by Electrical discharge machining or known as EDM. We focus our study on the droplet evaporation lifetime to investigate and identify the Leidenfrost temperature. Three (3) different types of materials were selected i. e such as Brass (Br), Aluminum (Al) and Copper (Cu). Meanwhile, ethanol liquid has been chosen as the test liquid. Ethanol liquid was elected due to its low boiling point of approximately 78 °C. The droplet impact velocity and droplet diameter was approximately 1.129 m/s and 3.476 mm, respectively. As a result, we finally succeeded in determining the Leidenfrost temperature for all materials mentioned above. On top of that, all the Leidenfrost temperature results, TL were close to the superheat limit temperature of ethanol liquid, TSL which is about 197.8 °C.

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Maximum spreading diameter of a water droplet after impact on a hot surface beyond Leidenfrost temperature

2023 , Mohd Zaidul Fikry Juhar , Muhammad Sofwan Mohamad , Suhaimi Illias , Nasrul Amri Mohd Amin , Suhaila Hussain , Mohd Hanafi Ani

The impact of liquid droplets on heated surfaces are relevance across a range of applications. The maximum spreading diameter of water droplet during impact on hot surface was experimentally studied. The surface was made of aluminium. The diameter and height of the aluminium block was 70.0 mm and 30.0 mm, respectively. During experiment, the test surface was heated beyond Leidenfrost temperature. A high-speed video camera was used to capture the droplet images from the first impact until the droplet reached maximum spreading condition. The frame rate was set to be 2,000 fps. Distilled water was used as the test liquid. The impact height was set to be about 65.0 mm. From the high-speed images analysis, the droplet diameter was found to be approximately 4.5 mm. The measured droplet maximum spreading diameters were found to have a good agreement with theoretical calculation.

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