Semnan University Press Journal of Heat and Mass Transfer Research 2345-508X Articles in Press 2025 11 08 Heat Transfer Enhancement in Rectangular Channels with Punched V-Ribs: An Experimental Investigation 10207 10.22075/jhmtr.2025.38168.1772 EN Channa Keshava Naik N Department of Mechanical Engineering, BGS College of Engineering and Technology, Bangalore-560086 (Affiliated to Visvesvaraya Technological University, Belagavi), Karnataka, India. Krishna S. Borate Department of Mechanical Engineering, Bhagwant University, Ajmer-305004, Rajasthan, India. Munna Verma Department of Mechanical Engineering, Bhagwant University, Ajmer-305004, Rajasthan, India. Vaibhav H. Bansode Department of Mechanical Engineering, SKNCOE, Pune-41, Maharashtra, India. Shekar Kannaiah Department of Mechanical Engineering, Ballari Institute of Technology and Management, Ballari, India. Venkatesh T Lamani Department of Mechanical Engineering, BMS College of Engineering , Bangalore (Affiliated to Visvesvaraya Technological University, Belagavi), Karnataka, India. Hasan Sh. Majdi Department of Chemical Engineering and Petroleum Industries, Al-Mustaqbal University College, Babylon 51001, Iraq Salah J Mohammad Civil Engineering Department, Dijlah University College, Baghdad-00964, Iraq. Journal Article 2025 06 30 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 shows that the winglet vortex generators' increased attack angles produce stronger secondary flows, which improve fluid mixing and 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 a same inclination as per trend. Compared to CRWVGs, RWVGs exhibit a lower pressure drop, however with 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°.