O. V. Sharypov, P. A. Kuibin, “Effect of motion of a local heat source on thermocapillary deformation of a thin liquid film flowing down under the action of gravity”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2010, Volume 36, Issue 15,Pages <nobr>1

Effect of motion of a local heat source on thermocapillary deformation of a thin liquid film flowing down under the action of gravity

O. V. Sharypov^ab, P. A. Kuibin^ab

^a S.S. Kutateladze Institute of Thermophysics, Siberian Division of the Russian Academy of Sciences
^b Novosibirsk State University

Abstract: The influence of a moving local heat source on the structure of flow in a thin liquid film flowing down on an inclined substrate under the action of gravity has been theoretically studied. Two-dimensional steady-state and conjugated hydrodynamic heat transfer problem has been solved in a long-wave approximation. The characteristics of flow are compared for various regimes: from the liquid film flowing down on a vertical surface with an immobile heat source to the behavior of a horizontal liquid layer under the action of a moving heat source. It is shown that changes in the flow velocity profile related to an increase in the velocity of the heat source motion and a decrease in the substrate slope under other equal conditions (constant flow rate, film thickness, and heat release) lead to a sharply increased thermocapillary deformation of the liquid film.

Received: 04.03.2010