Heat Transfer Enhancement in Rectangular Channels with Punched V-Ribs: An Experimental Investigation

Bansode, Vaibhav; Verma, Munna; Borate, Krishna; Lamani, Venkatesh T; Kannaiah, Shekar; Naik N, Channa Keshava; Majdi, Hasan Sh.; Mohammad, Salah J

doi:10.22075/jhmtr.2025.38168.1772

Heat Transfer Enhancement in Rectangular Channels with Punched V-Ribs: An Experimental Investigation

Document Type : Full Length Research Article

Authors

Vaibhav Bansode ¹^{, 2}

Munna Verma ¹

Krishna Borate ¹^{, 2}

Venkatesh T Lamani ³

Shekar Kannaiah ⁴

Channa Keshava Naik N ⁵

Hasan Sh. Majdi ⁶

Salah J Mohammad ⁷

¹ Department of Mechanical Engineering, Bhagwant University, Ajmer, Rajasthan, India

² Department of Mechanical Engineering, Smt. Kashibai Navale College of engineering, Pune, India

³ Department of Mechanical Engineering, BMS College of Engineering , Bangalore (Affiliated to Visvesvaraya Technological University, Belagavi), Karnataka, India

⁴ Department of Mechanical Engineering, Ballari Institute of Technology and Management, Ballari, India

⁵ Department of Mechanical Engineering, BGS College of Engineering and Technology, Bangalore-560086 (Affiliated to Visvesvaraya Technological University, Belagavi), Karnataka, India

⁶ Department of Chemical Engineering and Petroleum Industries, Al-Mustaqbal University College, Babylon, 51001, Iraq

⁷ Civil Engineering Department, Dijlah University College, Baghdad, 00964, Iraq

10.22075/jhmtr.2025.38168.1772

Abstract

In recent decades, researchers have focused on passive techniques that use vortex generators (VGs) to enhance the transport of heat. By trying to decrease the flow's pressure drop, this study aims to examine the strength of the vortex produced by VGs. The result show that the winglet vortex generators' increased attack angles produce stronger secondary flows, which improve fluid mixing and the heat transfer coefficient. Experiments were carried out in the Reynolds number range of 4096 to 20,480 in the current study to assess pressure drop and heat transfer enhancement. The study's findings show that, with comparatively modest errors, the measured coefficients of heat transport from the test data have the same inclination as per the trend. Compared to CRWVGs, RWVGs exhibit a lower pressure drop; however, there is a marginal reduction in heat transfer enhancements. Heat transfer performance was only decreased (by about 2.1%) when holes were added to RWVGs. But because of increased flow resistance, these improvements came with a higher pressure drop, for which RWVGs reached 35.37% and for CRWVGs even higher at 60°C.

Keywords

Heat transfer

Attack angle

Pressure decrease

Vortex intensity

Subjects

Heat exchanger design and testing

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