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°C 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.

实验研究了矩形腔中非恒定的热重力-毛细管对流，其中垂直壁之一被电流突然加热。研究了20°C时Prandtl值为Pr = 16的乙醇流的空间形式的时间变化。检查了受热壁上流体动力边界层的发展以及沿液层自由表面的流动。在边界层形成和一定体积的液体流动过程中，测量了垂直和水平速度分量的分布。使用热成像仪研究了液层自由表面温度场的演变。