This is an unedited manuscript accepted for publication and provided as an Article in Press for early access at the author’s request. The article will undergo copyediting, typesetting, and galley proof review before final publication. Please be aware that errors may be identified during production that could affect the content. All legal disclaimers of the journal apply.
Chetan Kumar Korde,
Pankaj Badgaiyan,
Tanmay Awasthi,
- M. Tech Scholar, Department of Mechanical Engineering, Sagar institute of research and technology, Bhopal, Madhya Pradesh, India
- Assistant Professor, Department of Mechanical Engineering, Sagar institute of research and technology,, Bhopal, Madhya Pradesh, India
- Assistant Professor, Department of Mechanical Engineering, Sagar institute of research and technology, Bhopal, Madhya Pradesh, India
Abstract
The enhancement of convective heat transfer in a double-pipe heat exchanger utilizing circular finned twisted tape inserts and helical screw-tapes with center rods, in conjunction with copper oxide nanofluid as the heat transfer medium. Computational Fluid Dynamics (CFD) simulations were conducted across Reynolds numbers ranging from 500 to 5000 to analyze heat transfer characteristics. The investigation focuses on Nusselt number improvement and friction factor analysis to assess thermal performance enhancement. Results demonstrate significant augmentation in convective heat transfer efficiency with both insert types compared to plain tubes, indicating their efficacy for practical heat exchanger applications. The study reveals that circular finned twisted tape inserts and helical screw-tapes with center rods substantially increase the Nusselt number across the entire Reynolds number range studied. Specifically, the circular finned twisted tape inserts achieve notable heat transfer enhancement, particularly at higher twist ratios (TR=9.8). Meanwhile, the helical screw-tapes with center rods exhibit favorable performance with increasing numbers of helices. These findings underscore the potential of these passive enhancement techniques to improve heat exchanger efficiency while managing pressure drop effectively.
Keywords: Heat Exchangers, Nanofluid, Turbulence, twist tape, circular fins
[This article belongs to Journal of Thermal Engineering and Applications (jotea)]
Chetan Kumar Korde, Pankaj Badgaiyan, Tanmay Awasthi. Enhanced Heat Transfer in Double Pipe Heat Exchanger with Circular Fins Using Copper Nanofluid and Twisted Tape Inserts: A Computational Study. Journal of Thermal Engineering and Applications. 2025; 12(01):-.
Chetan Kumar Korde, Pankaj Badgaiyan, Tanmay Awasthi. Enhanced Heat Transfer in Double Pipe Heat Exchanger with Circular Fins Using Copper Nanofluid and Twisted Tape Inserts: A Computational Study. Journal of Thermal Engineering and Applications. 2025; 12(01):-. Available from: https://journals.stmjournals.com/jotea/article=2025/view=191533
References
- Nicholls, R. A., Moghimi, M. A., & Griffiths, A. L. (2022). Impact of fin type and orientation on performance of phase change material-based double pipe thermal energy storage. Journal of Energy Storage, 50, 104671. https://doi.org/10.1016/j.est.2022.104671.
- Wang, Y., Qi, C., Ding, Z., Tu, J., & Zhao, R. (2021). Numerical simulation of flow and heat transfer characteristics of nanofluids in built-in porous twisted tape tube. Powder Technology, 392, 570-586.
- Mohsen, O. A., Muhammed, M. A., & Hasan, B. O. (2021). Heat transfer enhancement in a double pipe heat exchanger using different fin geometries in turbulent flow. Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, 45(2), 461-471.
- Bahiraei, M., Rahimi, Z., & Nazari, F. (2021). A combined multi-criterion optimization to determine optimum geometrical parameters for flow of an ecofriendly graphene-based nanofluid inside tube enhanced with twisted conical strip inserts. Powder technology, 377, 336-349.
- Khedher, N. B., Togun, H., Abed, A. M., Al-Najjar, H. M. T., Dulaimi, A., Mohammed, H. I., & Talebizadehsardari, P. (2023). Discharge performance assessment of a vertical double-pipe latent heat storage unit equipped with circular Y-shaped fins. Journal of Building Engineering, 75, 106870. https://doi.org/10.1016/j.jobe.2023.106870.
- Bahlekeh, A., Mouziraji, H. R., Togun, H., Tiji, A. E., Abed, A. M., Mohammed, H. I., & Talebizadehsardari, P. (2023). Evaluation of the solidification process in a double‐tube latent heat storage unit equipped with circular fins with optimum fin spacing. Energy Science & Engineering, 11(7), 2552-2570. https://doi.org/10.1002/ese3.1473
- Kia, S., Khanmohammadi, S., & Jahangiri, A. (2023). Experimental and numerical investigation on heat transfer and pressure drop of SiO2 and Al2O3 oil-based nanofluid characteristics through the different helical tubes under constant heat fluxes. International Journal of Thermal Sciences, 185, 108082.
- Hamza, N. F. A., & Aljabair, S. (2022). Evaluation of thermal performance factor by hybrid nanofluid and twisted tape inserts in heat exchanger. Heliyon, 8(12).
- Chaurasia, S. R., & Sarviya, R. M. (2021). Comparative thermal performance analysis on helical screw insert in tube with number of strips with nanofluid at laminar flow regime. Journal of Thermal Science and Engineering Applications, 13(1), 011017.
- Mao, S., Zhou, T., Wei, D., Liu, W., & Zhang, Y. (2021). Modeling of heat transfer of supercritical water in helical finned double pipe. International Journal of Heat and Mass Transfer, 180, 121754.
- Ju, Y., Zhu, T., Mashayekhi, R., Mohammed, H. I., Khan, A., Talebizadehsardari, P., & Yaïci, W. (2021). Evaluation of multiple semi-twisted tape inserts in a heat exchanger pipe using Al2O3 nanofluid. Nanomaterials, 11(6), 1570.
- Murthy, H. S., & Hegde, R. N. (2020). Investigations on thermal characteristics in a double pipe fitted with circular finned and frequently spaced helical twisted inserts and Graphene oxide nanofluid. Heat and Mass Transfer, 56(9), 2667-2679.
- Ahmad, S., Abdullah, S., & Sopian, K. (2020). A review on the thermal performance of nanofluid inside circular tube with twisted tape inserts. Advances in Mechanical Engineering, 12(6), 1687814020924893.
- Nagaraju, D., & Mohammad, A. R. (2022). Effect of graphene-based nanofluid on heat transfer performance of alternate elliptical axis oval tube heat exchanger. Applied Nanoscience, 12(6), 1839-1858.

Journal of Thermal Engineering and Applications
Volume | 12 |
Issue | 01 |
Received | 25/11/2024 |
Accepted | 27/12/2024 |
Published | 09/01/2025 |