We propose an algorithm based on dissipative particle dynamics (DPD) for simulations of conducting fluids in the presence of an electric field. In this model, the electrostatic equations are solved in each DPD time step to determine the charge density at the fluid surfaces. These surface charges are distributed on a thin layer of fluid particles near the interface, and the corresponding interfacial electric forces are added to other DPD forces. The algorithm is applied to the electrospinning process at the Taylor cone formation stage. It is shown that, when the applied voltage is sufficiently high, the algorithm captures the formation of a Taylor cone with analytical apex angle 98.6°. Our results demonstrate the potential of the presented DPD algorithm for simulating two-phase problems in the presence of an electric field with non-periodic boundary conditions.
Bibliographical noteFunding Information:
Y. Afshar was a recipient of a fellowship of the Graduate School Materials Science in Mainz (MAINZ) funded through the German Research Foundation in the Excellence Initiative (GSC 266) . In addition, the use of computation facilities of Sheikh Bahaie National High Performance Computing Center at Isfahan University of Technology is gratefully acknowledged.
Copyright 2012 Elsevier B.V., All rights reserved.
- Computer simulation
- Dissipative particle dynamics
- Electro hydrodynamics
- Taylor cone