Suspended Solids Migration & Electro-Osmotic Flow in Porous Media — Lesson 2

This lesson covers the concept of flow through porous media, focusing on the interception of suspended solids and the migration of fines in a porous medium. It explains the potential as a function of z, the concentration profile for positive and negative ions, and the concept of zeta potential. The lesson also discusses the Poisson's equation and its application in solving for the potential and velocity profiles. It further explores the concept of electro-osmotic flow and streaming potential, and their applications in microfluidics, such as in electro-osmotic pumps and cell membranes. The lesson concludes with a discussion on the implications of plugging on pressure drop.

Video Highlights

00:28 - Discussion on the interception of suspended solids and fines migration
05:41 - Application of Poisson's equation in solving for potential and velocity profiles
12:58 - Exploration of electro-osmotic flow and streaming potential
26:50 - Application of these concepts in microfluidics

Key Takeaways

- The flow through porous media involves the interception of suspended solids and the migration of fines.
- The potential as a function of z and the concentration profile for positive and negative ions play a crucial role in understanding this flow.
- Zeta potential, which can be measured, is a key factor in the dislodging and migration of particles.
- The Poisson's equation is instrumental in solving for the potential and velocity profiles in the flow through porous media.
- Electro-osmotic flow and streaming potential are significant concepts with applications in microfluidics, such as in electro-osmotic pumps and cell membranes.
- The plugging of the porous media can significantly increase the pressure drop.