Determination of the Optimal Turbulator Geometry for Heat Transfer Enhancement: An Integrated Approach Using CRITIC/MEREC and MARCOS
Öz
This study aims to optimise the thermohydraulic performance of biomimetic S-shaped turbulators by balancing the disadvantages of increased heat transfer and pressure drop. Unlike traditional optimisation methods, a new integrated Multi-Criteria Decision Making framework based on the MARCOS algorithm with a hybrid weighting mechanism combining CRITIC-MEREC was used to re-evaluate thirty experimental configurations in the literature. To eliminate subjectivity, objective criterion weights were determined using the hybrid CRITIC-MEREC approach, assigning slightly higher importance to the Nusselt number (0.51) than to the friction factor (0.49). The MARCOS algorithm identified the optimum design with a benefit score of 0.7465 for the experimental parameters Re ≈26175, R=50 mm, H=20 mm, Sy=29 mm, numbered 23. Unlike the reference study, which selected number 6 using TOPSIS, this study minimised subjectivity in the decision-making process by providing a more robust and accurate ranking using the MARCOS method. The findings confirm that the proposed methodology is a reliable optimisation tool for complex heat transfer problems
Anahtar Kelimeler
Heat transfer enhancement, Biomimetic S-shaped turbulator, MCDM, MEREC, MARCOS
Kaynakça
- Safikhani H, Eiamsa-Ard S. Multi-objective optimization of turbulent tube flows over diamond-shaped turbulators. Heat Transf Eng 2016;37:1579–84.
- Yıldırım O, Güven H. A hybrid CFD-RSM approach for optimizing heat transfer in channels with biomimetic S-shaped turbulators. J Brazilian Soc Mech Sci Eng 2026;48:73.
- Dagdevir T, Keklikcioglu O, Ozceyhan V. Multi-objective optimization of operating parameters for dimpled twisted tape inserted heat exchanger tube flowing water/ethylene glycol mixture-based TiO2 nanofluid. J Therm Anal Calorim 2025;150:11433–50. https://doi.org/10.1007/s10973-025-14455-7.
- Keklikcioglu O, Günes S, Senyigit E, Akcadirci E, Ozceyhan V. The optimization of the thermal and hydraulic characteristics of a tube with twisted tapes using Taguchi-based-AHP-TOPSIS approach. J Therm Anal Calorim 2022;147.
- Chamoli S. Preference selection index approach for optimization of V down perforated baffled roughened rectangular channel. Energy 2015;93:1418–25.
- Chamoli S. Hybrid FAHP (fuzzy analytical hierarchy process)-FTOPSIS (fuzzy technique for order preference by similarity of an ideal solution) approach for performance evaluation of the V down perforated baffle roughened rectangular channel. Energy 2015;84:432–42. https://doi.org/10.1016/j.energy.2015.03.007.
- Ravanbakhsh M, Deymi-Dashtebayaz M, Rezapour M. Numerical investigation on the performance of the double tube heat exchangers with different tube geometries and Turbulators. J Therm Anal Calorim 2022;147:11313–30.
- Jaiswal AK, Afzal A. Design optimization of prismatic rib turbulators in a rectangular channel based on multi-objective criterion. Int J Therm Sci 2023;185:108091.
- Şener R, Demir ME. Heat transfer and flow characteristics of a novel turbulator design in heat exchanger: Experimental and numerical analysis. Proc Inst Mech Eng Part A J Power Energy 2024;238:1228–37. https://doi.org/10.1177/09576509241257727.
- Öztürk M, Tezcan AO, Çiftçi E. Computational analysis of nanofluid-enhanced heat transfer in corrugated shell-and-tube heat exchanger utilized for heavy water reactor cooling. Prog Nucl Energy 2025;188:105863. https://doi.org/10.1016/j.pnucene.2025.105863.