Numerical Model of Electrokinetic Flow for Capillary Electrophoresis

✍ Scribed by Lianguang Hu; Jed D Harrison; Jacob H Masliyah

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 216 KB
• Volume: 215
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1999.6250

✦ Synopsis

A numerical study is presented for the steady electrokinetic flow in intersecting channels in a T-shaped configuration. The electric potential and space charge density distribution along the capillary are obtained numerically by solving the nonlinear Poisson-Boltzmann equation for arbitrary electrokinetic radius and arbitrary surface potential. The velocity and pressure profiles are obtained by solving a modified Navier-Stokes equation using a primitive variable algorithm. A systematic study of flow in T-shaped intersecting channels showed that the hydrodynamic effect is an important factor that influences fluid leakage out of a channel where the electric potential is left floating. It was found that the flow in each channel can be controlled by applying a potential at each reservoir connected to the end of a channel.