Experimental and numerical investigations on the effect of a novel internal surface micro grooving towards improving convective heat transfer performance of tube heat exchangers

Abdehalim Ahmed Eid, Mohamed Moustafa and Mohd Nashrul, Mohd Zubir and Muhammad, Mohd Ridha and Md. Salim Newaz, Kazi and Mt Aznam, Suazlan and Md Mehedy, Hasan Rony and Ibrahim, F. A. and Alam, Md Shadab and Sadri, Rad (2023) Experimental and numerical investigations on the effect of a novel internal surface micro grooving towards improving convective heat transfer performance of tube heat exchangers. Physics of Fluids, 35 (7). pp. 1-21. ISSN 1070-6631 E-ISSN 1089-7666

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Abstract

In the present work, the use of the passive heat transfer enhancement technique through surface alteration was explored. The enhancement was achieved through internal conduit surface microgrooving using a new apparatus that was developed by modifying a Magnetic Abrasive Finishing technique. A new surface profile was created and later verified using optical and laser profiler measurement. The new profile was investigated numerically to compare the heat transfer and hydrodynamic performance against other profiles that have been studied in the literature. It was found from the results that the new profile shows much higher heat transfer improvement and comparable pressure loss to the previously investigated profiles (i.e. square, rectangular, trapezoidal and circular). Overall, the new groove geometry provides the highest performance followed by the circular, triangular, curvy, square and rectangular grooves. Also, the results indicate that designs with a smooth profile performs better than those with sharp edges, owing to the elimination of stationary fluid spots within the grooves. The effectiveness between the profiles was compared based on the level of heat transfer enhancement against the flow penalty. Experimental validation was further conducted for the experimentally generated groove. The results revealed that a relatively small surface temperature drop was obtained, corresponding to a slight improvement in heat transfer. This confirms the results generated by the simulation that groove size plays a major role in attaining significant improvement in heat transfer

Item Type:	Article (Journal)
Additional Information:	8062/105541
Uncontrolled Keywords:	Surface modification, passive heat transfer enhancement, heat exchangers, convective heat transfer, microgrooving, microfin.
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) > TA349 Mechanics of engineering. Applied mechanics T Technology > TJ Mechanical engineering and machinery > TJ163.26 Energy conservation
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Dr. Suazlan Mt Aznam
Date Deposited:	13 Jul 2023 09:24
Last Modified:	29 Nov 2023 09:45
URI:	http://irep.iium.edu.my/id/eprint/105541

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