Proceedings of the
9th International Conference of Asian Society for Precision Engineering and Nanotechnology (ASPEN2022)
15 – 18 November 2022, Singapore
doi:10.3850/978-981-18-6021-8_OR-12-0141
Influence of Obstacle Section Shape on Electro-thermo-convection
1School of Mechanical Engineering, Yeungnam University, 280, Daehak-ro, Gyeongsan-si, Gyeongsangbuk-do, 712-749, Republic of Korea
ABSTRACT
In this work, the Lattice Boltzmann method is used to simulate the complex transport phenomenon of coupled heat transfer under electrothermal convection. First, four LBM equations of electric potential, charge density, flow field and temperature field in unified form are established. Secondly, the correctness of the model is confirmed by comparing the numerical results of the model's electrostatics with the analytical solution results. Finally, the influence of the cross-sectional shape of the obstacle on the electrothermal convection of the low-density dielectric liquid is analyzed. The simulation results show that for the fluid field, temperature field and charge field, the shape of the obstacle section has little effect. There is a clear difference in the electric field strength. The range and magnitude of the electric field intensity distribution of the circular section are obviously higher than those of the irregular circular section.
Keywords: Electro-thermo-convection, Multi-physical coupling, Lattice Boltzmann model
1School of Mechanical Engineering, Yeungnam University, 280, Daehak-ro, Gyeongsan-si, Gyeongsangbuk-do, 712-749, Republic of Korea
ABSTRACT
In this work, the Lattice Boltzmann method is used to simulate the complex transport phenomenon of coupled heat transfer under electrothermal convection. First, four LBM equations of electric potential, charge density, flow field and temperature field in unified form are established. Secondly, the correctness of the model is confirmed by comparing the numerical results of the model's electrostatics with the analytical solution results. Finally, the influence of the cross-sectional shape of the obstacle on the electrothermal convection of the low-density dielectric liquid is analyzed. The simulation results show that for the fluid field, temperature field and charge field, the shape of the obstacle section has little effect. There is a clear difference in the electric field strength. The range and magnitude of the electric field intensity distribution of the circular section are obviously higher than those of the irregular circular section.
Keywords: Electro-thermo-convection, Multi-physical coupling, Lattice Boltzmann model
