MHD natural convection nanofluid flow in a heat exchanger: Effects of Brownian motion and thermophoresis for nanoparticles distribution
Cao Y. Ayed H. Jarad F. Togun H. Alias H. Issakhov A. Dahari M. Wae-hayee M. El Ouni M.H.
December 2021Elsevier Ltd
Case Studies in Thermal Engineering
2021#28
The free convection of Cu-water nanofluid is simulated and investigated inside a square heat exchanger chamber in the presence of MHD magnetic field. The Buongiorno model with the effects of Brownian and thermophoresis motion is considered to nanoparticles distribution inside the chamber. The geometry consists of a square chamber with two cylinders on the right and left sides as heater and cooler in order to create the buoyancy force, respectively. These cylinders represent hot and cold pipes, and the walls of the chamber are heat and mass insulation. the FVM with SIMPLE algorithm are used for velocity and pressure coupling. In current two-phase simulation, the effects of Rayleigh number, Hartmann number, inclination angle of chamber and volume fraction on streamline contours, isothermal lines, Lorentz force lines, nanoparticle distribution and Nusselt number are investigated. By modeling the motion of nanoparticles and evaluating it, a nanoparticle transport zone was observed. The diffusion effects of thermophoresis were significant in this zone. The nanoparticles were thrown from the hot cylinder to the cold cylinder. The application of a magnetic field enlarged the nanoparticle transport zone. However, increasing the Rayleigh number and decreasing the inclination angle of the enclosure caused the nanoparticles to disperse evenly.
Buongiorno model , Cu nanoparticles , Heat exchanger , Heater/cooler , MHD , Natural convection
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Department of Civil Engineering, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia
Department of Mathematics, Cankaya University, Etimesgut, 06790, Ankara, Turkey
Department of Medical Research, China Medical University, Taichung, 40402, Taiwan
School of Chemical and Energy Engineering, Faculty of Engineering, University Teknologi Malaysia, UTM Johor, Bahru, 81310, Malaysia
Biomedical Engineering Department, University of Thi-Qar, Nassiriya, 64001, Iraq
Department of Mathematical and Computer Modelling, al -Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Department of Electrical Engineering, Faculty of Engineering, University Malaya, Kuala, 50603, Lumpur, Malaysia
Department of Mechanical and Mechatronics Engineering, Faculty of Engineering, Prince of Songkla University, Hatyai, 90110, Songkhla, Thailand
School of Mechatronic Engineering
Department of Civil Engineering
Department of Mathematics
Department of Medical Research
School of Chemical and Energy Engineering
Biomedical Engineering Department
Department of Mathematical and Computer Modelling
Department of Electrical Engineering
Department of Mechanical and Mechatronics Engineering
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