Effect of Winglet-Designed Vortex Generators on Heat Transfer Performance in Corrugated Channels

Abstract

This study focuses on improving heat transfer within corrugated channel. These channels are used to improve fluid mixing and heat transfer, but they typically result in recirculation zones inside. The study's goal is to reduce the amount of space that recirculates around the walls. To achieve this, we introduce vortex generators (VGs), where solid bodies are inserted to manipulate and change the flow direction. Winglet designs are used for the vortex generators at different angles, represented by the change in distance between the upper and lower winglets (D=2, 4, and 6 mm). This study is compared with a channel without vortex generators. The work is simulated using commercial software ANSYS Fluent based on conservation laws under different Reynolds numbers and turbulent flow. The SST k-omega model is commonly used due to its higher accuracy around walls. Parameters such as Nusselt number, pressure drop, pressure ratio, and performance enhancement factor are evaluated in detail.