Development of unsteady convection in a rectangular cavity with sudden heating of a vertical wall
V.S. Berdnikov1,2, V.A. Grishkov1, N.A. Shumilov1
1Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
Keywords: thermal-gravitational convection, thermocapillary effect, thin vertical wall, free convective boundary layer, velocity fields, heat wave, physical modeling, digital video recording, thermal imager
Abstract
Unsteady thermal gravitational-capillary convection in a rectangular cavity with sudden heating of one of the vertical walls by electric current was experimentally investigated. The development in time of the spatial form of ethyl alcohol flows with the Prandtl number Pr = 16 at 20°С was studied. The development of the hydrodynamic boundary layer on the heated wall and the flow along the free surface of a liquid layer was examined. The profiles of the vertical and horizontal velocity components were measured during the development of boundary layers and flow in a volume of liquid. Evolution of temperature fields on the free surface of a liquid layer was studied using a thermal imager.
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