Investigation of the effect of different materials on convective heat transfer

Abdulwehab Ibrahim; Perk Lin Chong; Vicnesvaran Rajasekharan; Mohamed Muzuhin Ali; Omar Suliman Zaroong; Nurye Oumer Ahmed

doi:10.15282/jmes.14.2.2020.08.0520

Authors

Abdulwehab Ibrahim Higher Colleges of Technology, Faculty of Engineering, Technology and Science, Mechanical Engineering Division, Nahyan the 1st Street, Al Ain Abu Dhabi, UAE.
Perk Lin Chong Teesside University, School of Computing, Engineering & Digital Technologies, Stephenson Street, Middlesbrough TS1 3BX, UK. Phone: +4401642384420.
Vicnesvaran Rajasekharan INTI International University, Persiaran Perdana BBN, 71800 Nilai, Negeri Sembilan, Malaysia.
Mohamed Muzuhin Ali INTI International University, Persiaran Perdana BBN, 71800 Nilai, Negeri Sembilan, Malaysia.
Omar Suliman Zaroong Sohar University, Mechanical and Mechatronic Engineering, Faculty of Engineering, Sohar, Sultanate of Oman.
Nurye Oumer Ahmed Universiti Malaysia Pahang, Faculty of Mechanical Engineering, 26600 Pekan, Pahang, Malaysia.

DOI:

https://doi.org/10.15282/jmes.14.2.2020.08.0520

Keywords:

Heat transfer, natural convection, forced convection, experimental, simulation, rate of heat transfer, thermal conductivity

Abstract

Conventionally, the study of convection heat transfer merely focuses on the behavior of air flow without considering the conductive effect of the horizontal flat plate. However, it is expected that the conductive effect of the horizontal plate somewhat affects the air flow temperature across the flat plate. Therefore, it is motivated to study the variation of air flow temperature across different materials of flat plate in various time frame. The materials used in this study are aluminium, stainless steel and cast iron. Infrared camera and FloEFD simulation software are used to measure the upper surface temperature of the flat plate. For forced convection, the study is carried out within the range of 10³ £ Re £ 10⁴ and within the range of 1 × 10⁷ £ Ra < 2.2 × 10⁷for natural convection. Flow velocity of 2.3 m/s, 4.1 m/s and 5.2 m/s are used for the forced convection. The results showed that aluminium plate cools down faster than the other two metal plates used in all scenarios. Stainless steel’s temperature goes down faster compared to cast iron. These results were supported by the fact that aluminium has higher heat transfer rate of other metals. For forced convection, the discrepancies of temperatures between experimental and simulation studies are below 10%, which demonstrates that the results are reasonably acceptable. For natural convection, even though the discrepancies between simulation and experimental results on temperature variations are relatively large, the temperatures varied in similar pattern. This indicates that the results are reliable.

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