RETRACTED: Turbulent flows in a spiral double-pipe heat exchanger: Optimal performance conditions using an enhanced genetic algorithm
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 26 September 2019
Issue publication date: 15 January 2020
Retraction statement
The publishers of International Journal of Numerical Methods for Heat & Fluid Flow wish to retract the article Tian, Z., Abdollahi, A., Shariati, M., Amindoust, A., Arasteh, H., Karimipour, A., Goodarzi, M. and Bach, Q.-V. (2020), “Turbulent flows in a spiral double-pipe heat exchanger: Optimal performance conditions using an enhanced genetic algorithm”, International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 30 No. 1, pp. 39-53. https://doi.org/10.1108/HFF-04-2019-0287.
An internal investigation into a series of submissions has uncovered evidence that the peer review process was compromised. As a result of these concerns, the findings of the article cannot be relied upon. This decision has been taken in accordance with Emerald's publishing ethics and the COPE guidelines on retractions.
The publishers of the journal sincerely apologize to the readers.
Abstract
Purpose
This paper aims to study the fluid flow and heat transfer through a spiral double-pipe heat exchanger. Nowadays using spiral double-pipe heat exchangers has become popular in different industrial segments due to its complex and spiral structure, which causes an enhancement in heat transfer.
Design/methodology/approach
In these heat exchangers, by converting the fluid motion to the secondary motion, the heat transfer coefficient is greater than that of the straight double-pipe heat exchangers and cause increased heat transfer between fluids.
Findings
The present study, by using the Fluent software and nanofluid heat transfer simulation in a spiral double-tube heat exchanger, investigates the effects of operating parameters including fluid inlet velocity, volume fraction of nanoparticles, type of nanoparticles and fluid inlet temperature on heat transfer efficiency.
Originality/value
After presenting the results derived from the fluid numerical simulation and finding the optimal performance conditions using a genetic algorithm, it was found that water–Al2O3 and water–SiO2 nanofluids are the best choices for the Reynolds numbers ranging from 10,551 to 17,220 and 17,220 to 31,910, respectively.
Keywords
Acknowledgements
The first author wants to acknowledge the following grants: NSFC (51709244), Taishan Scholar (tsqn201812025) and Fundamental Research Funds for the Central Universities (201941008).
Citation
Tian, Z., Abdollahi, A., Shariati, M., Amindoust, A., Arasteh, H., Karimipour, A., Goodarzi, M. and Bach, Q.-V. (2020), "RETRACTED: Turbulent flows in a spiral double-pipe heat exchanger: Optimal performance conditions using an enhanced genetic algorithm", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 30 No. 1, pp. 39-53. https://doi.org/10.1108/HFF-04-2019-0287
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited