Dispersion in Porous Media Contd. — Lesson 2

This lesson covers the concept of flow through porous media, focusing on miscible displacement and the dispersion of solute or tracer in porous media. It explains how mixing occurs inside the porous medium and how it can be theoretically characterized. The lesson also discusses the Dirac function, a pulse or a step change provided at the inlet, and how it affects the average concentration at the outlet. It further explores the concept of Peclet number and its importance in understanding the different regimes of flow. The lesson concludes with an overview of various approaches researchers have taken to arrive at a better understanding of the dispersion coefficient term.

Video Highlights

01:02 - Explanation of dispersion of solute or tracer in porous media
07:52 - Understanding the concept of Peclet number and its importance
12:00 - Examination of different regimes of flow
27:36 - Exploration of various approaches to understand the dispersion coefficient term

Key Takeaways

- The flow through porous media involves a process of miscible displacement, where mixing occurs inside the porous medium.
- The Dirac function, a pulse or step change at the inlet, significantly affects the average concentration at the outlet.
- The Peclet number is a crucial concept in understanding the different regimes of flow, including pure diffusion, pure convection, and Taylor dispersion.