SURFACE-TENSION DRIVEN INSTABILITY IN A HORIZONTAL LAYER OF BINARY-LIQUID MIXTURE IN THE PRESENCE OF THE SORET EFFECT

The problem of the onset of surface tension driven instability in a horizontal layer of binary liquid mixture subjected to a vertical temperature gradient is examined using linear stability theory. The solute is assumed to be a non-surfactant and the Soret effect is taken into account. Assuming that the neutral state is a stationary one, the conditions under which instability sets in are determined in detail and it is found that the presence of the solute can play a prominent role through the Soret effect. © 1979, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.