When the liquid interface drains towards the outside it is observed that stress decreases, until the dimple drains completely out of the drop surface.ДЄ model based on Navier-Stokes equations that describes dimple dynamics was elaborated. When thickness of the interfacial film is 4.5 stress grows up to a maximum value and finally it decreases until being annulled. Depending on the thickness of the interfacial film, diverse factors must be taken into account that have a marked influence on the physics of the problem. Very different mechanisms are known to take place in the problem of emulsion stability (Kashchiev and Exerowa, 1980 Exerowa et al., 1983 Ivanov, 1988 Bibette, 1992 Bibette et al., 1992 Sonin et al., 1994 Kabalnov and WennerstrГ¶m, 1996). Keywords / Coalescence / Dimple / Drops / Fluid Mechanics / Interfacial Film / A fim de resolver a equaГ§ГЈo se utilizou o mГ©todo de diferenГ§as finitas. Consideraram-se certas condiГ§Гµes que devem cumprir-se na interfase, as quais servem para completar o sistema de equaГ§Гµes diferenciais e conduzem a uma equaГ§ГЈo de evoluГ§ГЈo que descreve a dinГўmica da pelГcula interfacial. As equaГ§Гµes de Navier-Stokes sГЈo consideradas, e dois enfoques fundamentais sГЈo utilizados para simplificar o tratamento matemГЎtico das equaГ§Гµes hidrodinГўmicas. PropГµe-se um modelo que permite a descriГ§ГЈo da dinГўmica de uma depressГЈo superficial (dimple) apГіs ter se formado. Um modelo simples para a descriГ§ГЈo da dinГўmica de um dimple A fin de resolver la ecuaciГіn se utilizГі el mГ©todo de diferencias finitas. Se consideraron ciertas condiciones que deben cumplirse en la interfase, las cuales sirven para completar el sistema de ecuaciones diferenciales y llevan a una ecuaciГіn de evoluciГіn que describe la dinГЎmica de la pelГcula interfacial. Las ecuaciones de Navier-Stokes son consideradas, y dos enfoques fundamentales son utilizados para simplificar el tratamiento matemГЎtico de las ecuaciones hidrodinГЎmicas. Se propone un modelo que permite la descripciГіn de la dinГЎmica de una depresiГіn superficial (dimple) una vez que se ha formado. Un modelo sencillo para la descripciГіn de la dinГЎmica de un dimple With the intention of solving this equation, the method of finite differences has been used. Certain conditions are considered that must be fulfilled at the interface, which serve to close the system of differential equations and lead to an evolution equation that describes the interfacial film dynamics. The Navier-Stokes equations are considered, and two fundamental approaches are used to simplify the mathematical treatment of the hydrodynamics equations. e-mail: model based on the hydrodynamics equations that allows to describe the dynamics of a dimple, once it has formed, is proposed. Researcher, IVIC, Physics Center, Venezuela. Address: Centro de FГsica Aplicada, Carretera Panamericana vГa JajГ, Finca El Tucuche, MГ©rida 5101, Venezuela. in Physics, Venezuelan Institute for Scientific Research (IVIC), Venezuela. Acevedo-MalavГ©, Eloy Sira and MГЎximo GarcГa-SucreДЄlejandro JosГ© Acevedo-MalavГ©. A simple model to describe dimple dynamicsДЄlejandro J.

Simplificador de ecuaciones