A new correlation for predicting the hydrothermal characteristics over flat tube banks
Abstract
The flat tubes are necessary apparatus to design the modern heat exchangers. In this context, a CFD (computational fluid dynamics) study has been achieved to explore the influence of the flat tube size on the heat transfer characteristics in cross-flow over flat tube banks. The calculations are performed with the help of the computer code (Fluent) which is based on the finite volume method to solve the continuity, momentum and energy equations. The numerical investigations are achieved for laminar flow (Reynolds numbers changing from 50 to 800), two dimensional and incompressible fluids. Some predicted results are compared with available experimental data of the literature and a satisfactory agreement is observed. The obtained results show a decrease in the heat transfer coefficient with increased flat tube size. A new valuable empirical correlation is suggested for the prediction of heat transfer coefficients over a flat tube bank. The proposed correlation may be useful for engineers to predict the heat transfer rates in such devices without requirements of experimental measurements.
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Author Biographies
Djamel Sahel is a doctor in the Depatment of Technical Sciences at University of Laghouat, Algeria. He obtained his engineering degree in energy mechanics in 2007. In the same specialty, he obtained his Master and PhD degrees in 2011 and 2017, respectively from the University of Science and Technology USTO-MB, Oran, Algeria. Her research fields are heat transfer, fluid flow, membrane systems and optimization of thermal systems.
Houari Ameur is a Professor in the Department of Technology at the University Centre of Naama (Ctr Univ Naama). He received his Engineering Diploma in 2006 in Marine Engineering, his Master Degree in 2008, his PhD in 2012 and his HDR in 2013 in Mechanical Engineering from University of Science and Technology, Oran (USTO-MB), Algeria. His current research interests are mainly in the area of non-Newtonian fluid flows, mechanical mixing, Computational Fluid Dynamics, heat exchangers and thermal applications.
Warda Boudaoud is a PHD student in the Department of Mechanical Engineering, University of Science and Technology Mohamed Boudiaf of Oran (USTO-MB), Algeria. Her research interests are mainly on heat transfer, fluid flow and Computational Fluid Dynamics.
Copyright (c) 2019 Djamel Sahel, Houari Ameur, Warda Boudaoud
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