Lattice Boltzmann simulation for hydrothermal analysis of free convection within dumbbell-shaped heat exchanger |
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| Authors: | Alireza Rahimi Ali Dehghan Saee Abbas Kasaeipoor Payam Hooshmand Emad Hasani Malekshah |
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| Institution: | 1. Faculty of Energy, University of Kashan, Kashan, Iran;2. Spray and Petroleum Research Group, School of Computing, Science and Engineering, University of Salford, Manchester M5 4WT, UK;3. Faculty of Engineering, Department of Mechanical Engineering, University of Isfahan, Hezar Jerib Avenue, Isfahan 81746-73441, Iran;4. Department of Mechanical Engineering, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran;5. School of Mathematical Sciences, The University of Adelaide, Adelaide, SA 5005, Australia |
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| Abstract: | The lattice Boltzmann simulation of nanofluid flow and heat transfer during natural convection within a dumbbell-shaped heat exchanger is carried out. The heat exchanger is filled with CuO–water. The KKL model is employed to predict the thermo-physical properties of nanofluid. In order to perform a comprehensive hydrothermal investigation, different post-processing approaches such as heatline visualization, total entropy generation, local entropy generation based on local fluid friction irreversibility and heat transfer irreversibility, average and local Nusselt variation are employed. In the present investigation, it is tried to present the impact of different influential parameters like Rayleigh number, solid volume fraction of nanofluid and thermal arrangement of internal fins-bodies on the fluid flow, heat transfer rate and entropy generation. |
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| Keywords: | Dumbbell-shaped heat exchanger CuO–water nanofluid KKL model Lattice Boltzmann method Heatline visualization |
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