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Abstract
The current article deals with laminar natural convection in an irregular arc-shaped enclosure with a heated base and cooled upper top. The domain is filled with a liquid with Prandtl number of 4.0. This two-dimensional study focuses attention to understand changes in flow and temperature field development due to variation in aspect ratio from 0.1 to 0.4 for each case of Grashof number varies from 104 to 107. The paper also addresses the effect of orientation by placing the enclosure at an inclined position with angles of 45° and 90°. The flow behavior and thermal characteristics have been investigated through streamlines and isotherms, respectively. Complete domain has been chosen for analysis. Asymmetric solutions are also observed for some of the cases. These results are confirmed by the development of the corresponding convection loops and also by the variation of local Nusselt number. Finally, the paper summarizes the effects of different parameters on the rate of heat transfer.
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Notes on contributors
Mahendra Pratap Singh
Mahendra Pratap Singh is a M.Tech. (Thermal Engineering) student at Gautam Buddha University Greater Noida, India, under the supervision of the Dr. Harishchandra Thakur. He completed his B.Tech. (Mechanical Engineering) degree from Gautam Buddha University. He is currently working on numerical analysis of natural convection in arc-shaped enclosures.
Anupam Rajvanshi
Anupam Rajvanshi is a M.Tech. (Thermal Engineering) student at Gautam Buddha University Greater Noida, India. He received a bachelor’s degree in Mechanical Engineering from Gautam Buddha University. He is currently working on the numerical analysis of two- and three-dimensional objects with the consideration of both convection and radiation effects.
Harishchandra Thakur
Harishchandra Thakur is an Assistant Professor at the Department of Mechanical Engineering in Gautam Buddha University, Greater Noida, India. He received the Ph.D. degree from IIT Roorkee in the area of Numerical Heat Transfer in 2010. He completed his M.E. (Thermal Engineering) from MIED, University of Roorkee (currently IIT Roorkee) in 1999. He has been in the teaching profession for 15 years. His areas of interest are numerical heat transfer in the enclosure cavity, phase change problems, vehicle air-conditioning, and solar energy.