Convective Heat Transfer Enhancement using Novel Twisted Tape-A Numerical Investigation
Prince Abraham Benjamin¹, Nithin Mohan Mohana Anitha^2
1Prince Abraham Benjamin, Department of Mechanical Engineering, National Engineering College, Kovilpatti (Tamil Nadu), India.
²Nithin Mohan Mohana Anitha, Department of Mechanical Engineering, National Engineering College Kovilpatti (Tamil Nadu), India.
Manuscript received on 31 May 2023 | Revised Manuscript received on 06 July 2023 | Manuscript Accepted on 15 July 2023 | Manuscript published on 30 July 2023 | PP: 1-8 | Volume-10 Issue-7, July 2023 | Retrieval Number: 100.1/ijies.F42120812623 | DOI: 10.35940/ijies.F4212.0710723
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Abstract: Convective heat transfer and pressure drop characteristics have been investigated numerically in a tube fitted with a twisted tape and a modified twisted tape. A novel geometry of the tape, with and without lateral projection, is introduced for comparison. The results obtained from ordinary twisted tape are compared with those of the Modified twisted tape with lateral projection and modified twisted tape without lateral projection. The experiments reveal that the pressure drop is lower in the modified twisted tape without lateral projection than in the modified twisted tape with lateral projection. However, the Nusselt number in the modified twisted tape without lateral projection is slightly less than in the base case with ordinary twisted tape. The Nusselt number in the modified twisted tape with lateral projection is higher than that of the ordinary twisted tape because the lateral projection diverts the fluid towards the boundaries, thereby increasing the thermal performance factor. Thus, the modified twisted tape without lateral projection increases the thermal performance factor to 1.0065 by decreasing the pressure drop, and the modified twisted tape with lateral projection increases the thermal performance factor to 1.1584 by increasing the Nusselt number.
Keywords: Heat Transfer, Swirl Flow, Twisted Tape, CFD, Passive Augments.
Scope of the Article: Heat Transfer