Development of unsteady convection in a rectangular cavity with sudden heating of a vertical wall

Grishkov

et al. 2021

The development of convective flow in a layer of ethyl alcohol when heating one of the vertical walls of a rectangular cavity was investigated experimentally. Thermal films were obtained, whose processing allowed plotting in time the distribution of temperature and temperature gradients on the free surface of the liquid layer and the opposite thin vertical wall of the cavity after the flow of heated liquid on it.

Section: Experimental Modelmentioning

confidence: 99%

Influence of thermal gravitational-capillary convection on temperature fields in a thin wall

Bodneva

Grishkov

et al. 2021

Experimental studies of the evolution of non-stationary natural convective boundary layers at different heat flux densities on a vertical wall

Grishkov

Mikhajlov

2020

The evolution of convective flow in a layer of ethyl alcohol with a free surface after sudden heating of one of the vertical walls of a rectangular cavity is experimentally studied. The evolution of a non-stationary hydrodynamic boundary layer on a heated vertical wall in time is studied using digital video recording and computer processing of video films. The evolution of the flow along the free surface of the liquid layer is investigated. Using a thermal imager, the time evolution of the temperature field on a thin metal vertical wall after the flow of a heated liquid is investigated.

Evolution of non-stationary boundary layers in a vertical liquid layer in the regime of conjugated natural convective heat exchange

Mitin

Mitina

2020

The evolution of non-stationary boundary layers under monotonous heating to a given temperature of the outer surface of one of the walls of a vertical liquid layer is numerically studied. The finite element method is used to solve a system of equations for unsteady thermogravitation convection in the Boussinesq approximation in terms of vortex, stream function, and temperature. The process of formation of non-stationary boundary layers on the heated wall is studied depending on the layer height. In a two-dimensional conjugate problem statement, distributions of non-stationary temperature and velocity fields in a liquid with a Prandtl number of 10 are obtained. Distributions of non-stationary temperature fields in mirror glass walls and temperature gradients on the walls are obtained as well. The calculations are made for the Rayleigh number equal to 106.