THERMAL GRAVITATIONAL-CAPILLARY CONVECTION IN 
A CAVITY WITH A LONGITUDINAL TEMPERATURE GRADIENT
V. S. Berdnikov, V. A. Gaponov, and
L. S. Kovrizhnykh

UDC 536.24;532.529.2;621.746

Convective heat exchange in a flow of liquid in a 
rectangular cavity with the length-to-height ratio of a liquid layer 
L / H = 10 is investigated. The conditions of thermal insulation 
or linear distribution of temperature were kept on the lower horizontal 
surface. Three types of boundary conditions for velocity were set 
on the upper boundary: rigid, free without friction, and free with 
imposition of a thermocapillary effect. The vertical walls of the 
cavity are isothermal and heated to different temperatures. The investigated 
regimes were of thermogravitational, thermocapillary, and thermal 
gravitational-capillary convection. A comparative analysis of the 
evolution of flow structure with increase in the Rayleigh (Ra) and 
Marangoni (Ma) numbers is carried out.

S. S. Kutateladze Institute of Thermophysics, Siberian 
Branch of the Russian Academy of Sciences, Novosibirsk, Russia; email: 
berdnikov@itp.nsc.ru. Translated from Inzhenerno-Fizicheskii Zhurnal, 
Vol. 74, No. 4, pp. 116-121, July-August, 2001. 
Original article submitted September 11, 2000.

JEPTER7492020017 
JEPTER749207