1. Numerical Study of Electro-Osmotic Fluid Flow and Vortex Formation
- Author
-
A. Castelo, Alexandre M. Afonso, and Wesley De Souza Bezerra
- Subjects
finite differences ,lcsh:Mechanical engineering and machinery ,Nozzle ,Perturbation (astronomy) ,HiG-Flow ,02 engineering and technology ,electro-osmotic ,01 natural sciences ,Viscoelasticity ,Article ,010305 fluids & plasmas ,Physics::Fluid Dynamics ,HiG-Tree ,viscoelastic ,FLUXO DOS FLUÍDOS ,0103 physical sciences ,Fluid dynamics ,lcsh:TJ1-1570 ,Electrical and Electronic Engineering ,Contraction (operator theory) ,Physics ,Microchannel ,Mechanical Engineering ,Finite difference ,Mechanics ,021001 nanoscience & nanotechnology ,Vortex ,Control and Systems Engineering ,0210 nano-technology - Abstract
The phenomenon of electro-osmosis was studied by performing numerical simulations on the flow between parallel walls and at the nozzle microchannels. In this work, we propose a numerical approximation to perform simulations of vortex formation which occur after the passage of the fluid through an abrupt contraction at the microchannel. The motion of the charges in the solution is described by the Poisson&ndash, Nernst&ndash, Planck equations and used the generalized finite differences to solve the numerical problem. First, solutions for electro-osmotic flow were obtained for the Phan&ndash, Thien/Thanner model in a parallel walls channel. Later simulations for electro-osmotic flow were performed in a nozzle. The formation of vortices near the contraction within the nozzle was verified by taking into account a flow perturbation model.
- Published
- 2019