سال انتشار: ۱۳۹۰

محل انتشار: نوزدهمین همایش سالانه مهندسی مکانیک

تعداد صفحات: ۴

نویسنده(ها):

H. Paknemat – Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
A. R. Pishevar – Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
P. Pournaderi – Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran

چکیده:

Electrohydrodynamics (EHD) is a branch of science which deals with the coupling of hydrodynamics and electrostatics. Electric drop deformation has a wide variety of applications. Knowledge of this phenomenon is useful in the study of aerosols, in the enhancement of heat or mass transfer between phases, coalescence, ink jet printing and many other industrial applications. In order to simulate the dynamic of a 2D axisymmetric droplet in an electric field, in this study the level-set method along with the ghost-fluid method are used. The incompressible Navier-stokes equation has been employed for modeling the internal and external fluid flow of the droplet. In addition, to calculate the electric potential in the entire domain, the Poisson equation with discontinuous coefficients has been solved using the ghost-fluid method. One type of droplet, namely, perfect dielectric droplet has been investigated in the present work. In the mentioned case, the electrically induced forces between two fluids are incorporated in the interfacial stress condition through a sharp manner. The results show the capability of the method in the modeling of dropletdeformation.