Abstract:

 A study of retardation of the coalescenec of a small liquid drop effected by the solute Marangoni effect is presented. The state and movement of the nitroethane drop deposited on the surface of an aqueous solution of 1-pentanol and affected by the self-induced interfacial flux are studied experimentally. It is shown that in certain system the solute Marangoni effect can induce a suspending state of the drop at the plane surface of an aqueous solution and effect appreciably the coalescence process of the drop ,and the movement of the drop caused by the interfacial flux presents quite different dynamic properties according to the different state of the drop at the surface. The calculation of the velocity of the drop motion on this consistent is in consistent with the experimental data.

Key words: Marangoni effect, Coalescence, Interfacial flux