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Advances in Nano Research
  Volume 15, Number 3, September 2023 , pages 191-201
DOI: https://doi.org/10.12989/anr.2023.15.3.191
 


Investigation on the heat transfer of MHD nanofluids in channel containing porous medium using lattice Boltzmann method
Xiangyang Liu, Jimin Xu, Tianwang Lai and Maogang He

 
Abstract
    In order to develop better method to enhance and control the flow and heat transfer inside the radiator of electronic device, the synergistic effect of MHD nanofluids and porous medium on the flow and heat transfer in rectangular opened channel is simulated using Lattice Boltzmann method. Three nanofluids of CuO-water, Al2O3-water and Fe3O4-water are studied to analyze the influence of the type of nanofluid on the synergistic effect. The simulation results show that the porous medium can increase the flow velocity in fluid zone adjacent to the porous medium and enhance the heat transfer on the surface of the channel. Under no magnetic field, when the porosity of porous medium is 0.8, the Nusselt number is 4.46% higher than when the porosity is 0.9. Al2O3-water has the best heat transfer effect among the three nanofluids. At ø=0.06, Ha=100, Θ=90°, ε=0.9, Nu of Al2O3-water is 6.51% larger than that of CuO-water and 5.05% larger than that of Fe3O4-water. Magnetic field enhances seepage in porous medium and inhibits heat transfer in the bottom wall. When Ha=30 and 60, the inhibiting effect is the most significant as the magnetic field angle is 90°. And when Ha=100, the inhibiting effect is the most significant as the magnetic field angle is 120°.
 
Key Words
    heat transfer; LBM; MHD; nanofluid; porous medium
 
Address
Xiangyang Liu, Jimin Xu, Tianwang Lai and Maogang He: Key Laboratory of Thermal Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi'an Jiaotong University, No.28, Xianning West Road, Xi'an, Shaanxi, 710049, P.R. China
 

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