Transient Electro-Osmotic and Pressure Driven Flows through a Microannulus

• 作者: Jie Su Long Chang Quansheng Liu Ren Na Yongjun Jian
• 来源期刊: 流体动力学(英文)
• 学科: 物理学
• 关键词: Microannulus Electric Double Layer (EDL) UNSTEADY EOF/PDF Hydromechanics
• 年，卷（期）: ltdlxyw,（2）
• 页码范围: 50-56
• 页数: 7页
• 分类号: O3

摘要

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.