Abstract
The heat transfer from a vertical silicon rod heated by passing an electric current, placed in a cylindrical container filled with gas, with isothermal cold side walls, in the regime of non-stationary conjugate natural convection heat exchange, is studied numerically by the finite element method in a three-dimensional formulation of the problem. On the surface of the rod, a control point is selected, at which a constant temperature is maintained by changing the voltage of the electric current. The equations of thermogravitational convection are solved in the Boussinesq approximation in the terms of temperature, vortex, and vector field potential. The spatial form of convective flows is investigated. Temperature fields in a gas and in a solid are investigated. The calculations were performed with the Prandtl number equal to 0.67 and the Rayleigh number range from 104 to 5•105.
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