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- 저자 : Maogang He (검색결과 1 건)
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Xiangyang Liu,Jimin Xu,Tianwang Lai,Maogang He Techno-Press 2023 Advances in nano research Vol.15 No.3
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, Al<sub>2</sub>O<sub>3</sub>-water and Fe<sub>3</sub>O<sub>4</sub>-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. Al<sub>2</sub>O<sub>3</sub>-water has the best heat transfer effect among the three nanofluids. At Ф=0.06, Ha=100, θ=90°, ε=0.9, Nu of Al<sub>2</sub>O<sub>3</sub>-water is 6.51% larger than that of CuO-water and 5.05% larger than that of Fe<sub>3</sub>O<sub>4</sub>-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°.
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