Heat Transfer Enhancement Through The Use Of Vortex Generator

Chou, Aw Lin (2020) Heat Transfer Enhancement Through The Use Of Vortex Generator. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The study focusses on the heat transfer performance of fluid flow with the presence of vortex generator inside a heat exchanger using a CFD model. The main purpose of a heat exchanger is to exchange heat between two fluids, the heat transfer performance is relatively important in a heat exchanger. Thus, vortex generator is introduced to improve the heat transfer in a heat exchanger. Fluid flow can be in steady flow, where the fluid leaves the system after exchanging heat, or also in oscillatory flow, where the fluid oscillates periodically in the heat exchanger. Two models involving steady flow and oscillatory flow are done in CFD modelling. The heat transfer performance is analyses by considering a heat transfer parameter which is Colburn-j factor for both steady and oscillatory flow. Colburn-j factor correlates with the Nusselt number, Reynolds number, and Prandtl number. Vortex generator provides a heat transfer enhancement in both steady flow and oscillatory flow. The study is compared with previous study and theoretical calculation. Since, oscillatory flow heat equation is not well established, steady flow heat equation is used in this study. However, the heat transfer behaviour in a steady flow and oscillatory flow varies. Hence, the heat equation in steady flow might not be suitable to be directly used in oscillatory flow conditions

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