Natural convection heat transfer in a rectangular channel with inclined longitudinal V-grooves
Sarmad A. Abdul Hussein1, Suhaib J. Shbailat2, Mohammed A. Nima1 and Alyaa H Akhbala1
Department of Mechanical Engineering, College of Engineering,University of Baghdad, Baghdad,Iraq1
Department of Unmanned Aerial Vehicle (UAV) Engineering,College of Engineering, Al-Nahrain University, Baghdad,Iraq2
Department of Unmanned Aerial Vehicle (UAV) Engineering,College of Engineering, Al-Nahrain University, Baghdad,Iraq2
Corresponding Author : Suhaib J. Shbailat
Recieved : 04-September-2024; Revised : 13-May-2025; Accepted : 16-May-2025
Abstract
The principle of heat transfer enhancement has been widely applied in various fields, including electronic cooling—particularly in central processing units (CPUs)—heat exchanger units, gas turbine blade cooling, biomedical devices, and nuclear power plants. In the present study, a series of experiments was conducted to investigate free convection heat transfer in a horizontal rectangular duct. Three flat plates were tested: the first was a smooth plate without grooves, while the second and third had V-grooves inclined at 30° and 60°, respectively, relative to the horizontal. The objective was to examine the effect of varying heat flux rates, ranging from 148.6 to 1248 W/m², on the heat transfer coefficient and Nusselt number for both smooth and V-grooved plates. The results indicated that the V-grooved plate inclined at 30° significantly enhanced the heat transfer rate with increasing heat flux. Empirical correlations for the mean Nusselt number as a function of the Rayleigh number were derived for each of the plates tested.
Keywords
Heat transfer enhancement, Free convection, V-grooved plates, Nusselt number, Rectangular duct.
Cite this article
Hussein SAA, Shbailat SJ, Nima MA, Akhbala AH. Natural convection heat transfer in a rectangular channel with inclined longitudinal V-grooves. International Journal of Advanced Technology and Engineering Exploration. 2025;12(126):722-732. DOI : 10.19101/IJATEE.2024.111101622
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