Gradient Descent-Based Prediction of Heat-Transmission Rate of Engine Oil-Based Hybrid Nanofluid over Trapezoidal and Rectangular Fins for Sustainable Energy Systems

Maddina Dinesh Kumar^1,#, S. U. Mamatha², Khalid Masood³, Nehad Ali Shah^4,#, Se-Jin Yook^1,*
1 School of Mechanical Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea
2 Faculty of Mathematics, Institute of Management, Kristu Jayanti Deemed to be University, K. Narayanapura, Kothanur, Bengaluru, 560077, India
3 Department of Mathematics and Statistics, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 11623, Saudi Arabia
4 Department of Mechanical Engineering, Sejong University, Seoul, 05006, Republic of Korea
* Corresponding Author: Se-Jin Yook. Email: ysjnuri@hanyang.ac.kr
# These authors contributed equally to this work
(This article belongs to the Special Issue: Computational Intelligent Systems for Solving Complex Engineering Problems: Principles and Applications-III)

Computer Modeling in Engineering & Sciences https://doi.org/10.32604/cmes.2025.074680

Received 15 October 2025; Accepted 28 November 2025; Published online 12 December 2025

Download PDF

Abstract

Fluid dynamic research on rectangular and trapezoidal fins is aimed at increasing heat transfer by means of large surfaces. The trapezoidal cavity form is compared with its thermal and flow performance, and it is revealed that trapezoidal fins tend to be more efficient, particularly when material optimization is critical. Motivated by the increasing need for sustainable energy management, this work analyses the thermal performance of inclined trapezoidal and rectangular porous fins utilising a unique hybrid nanofluid. The effectiveness of nanoparticles in a working fluid is primarily determined by their thermophysical properties; hence, optimising these properties can significantly improve overall performance. This study considers the dispersion of Graphene Oxide (GO) and Molybdenum Disulphide in the base fluid, engine oil. Temperature profiles are analysed by altering the radiative, porosity, wet porous, and angle of inclination parameters. Surface and contour plots are constructed by using the Lobatto IIIa Collocation Method with BVP5C solver in MATLAB and Gradient Descent Optimisation to predict the combined heat transfer rate. According to the study, fluid temperature consistently decreases when the angle of inclination, wet porous parameter, porosity parameter, and radiative parameter increase, suggesting significantly improved heat dissipation. The trapezoidal fin consistently exhibits a superior heat transfer mechanism than a rectangular fin. It is found that the trapezoidal fin transmits heat at a rate that is 0.05% higher than that of the rectangular fin. Validation of the present study is done through the comparison of previous studies. This research provides useful design insights for sophisticated engineering uses, including electrical cooling devices, heat exchangers, radiators, and solar heaters.