Численное исследование влияния числа Остроградского на естественно-конвективный теплоперенос и тепловое поверхностное излучение в замкнутом контуре

Abstract

Unsteady natural convection combined with surface thermal radiation in closed cavity with a local heat-generating source has been investigated. The heat source of triangular shape of internal volumetric heat generation is located on the bottom wall. The vertical side walls are supposed to be isothermal and cooled. The governing equations of conservation of momentum, mass and energy, described the fluid flow and heat transfer have been represented by dimensionless variable "stream function - vorticity - temperature". The effects of the heat source power and emissivity factor on fluid flow and heat transfer within the cavity have been analyzed. Streamlines and isotherms as well as fluid flow rate, the local Nusselt numbers, average convective and radiative Nusselt numbers have been obtained.