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Abstract

This paper is focused on turbulent heat transfer, enhancement in twisted triangular tube heat exchangers. Triangular twisted tube with (1m) length and (0.03m) diameter was tested for different twist ratios (5, 10 and 20) and Reynolds numbers (Re=5000 to 25000) consequently. The governing equations used in the analysis of the flow field and heat transfer are the momentum, continuity and energy equations. The numerical solution for turbulent flow field and heat transfer is governed by the techniques of a finite volume method with ANSYS Fluent 17.1. The computational data indicated that the twisted tube showed increasing in heat transfer as compared with a plain tube. The twisted ratio was the main affecting parameter for heat transfer improvement and friction losses. The numerical results are compared with published results and an acceptable agreement is achieved.