TITLE:
Transient Electro-Osmotic and Pressure Driven Flows through a Microannulus
AUTHORS:
Ren Na, Yongjun Jian, Long Chang, Jie Su, Quansheng Liu
KEYWORDS:
Microannulus; Electric Double Layer (EDL); Unsteady EOF/PDF; Hydromechanics
JOURNAL NAME:
Open Journal of Fluid Dynamics,
Vol.3 No.2,
June
5,
2013
ABSTRACT: Flow behavior of transient mixed electro-osmotic and pressure driven flows (EOF/PDF) through a microannulus is investigated based on a linearized Poisson-Boltzmann equation and Navier-Stokes equation. A semi-analytical solution of EOF velocity distribution as functions of relevant parameters is derived by Laplace transform method. By numerical computations of inverse Laplace transform, the effects of inner to outer wall zeta potential β, the normalized pressure gradient Ω and the inner to outer radius ratio α on transient EOF velocity are presented.