Types of Dispersion in Porous Media — Lesson 4

This lesson covers the concept of flow through porous media, focusing on miscible displacement and the mixing that occurs as flow takes place inside a porous medium. It discusses the dispersion of solute or tracer in porous media, the concept of dispersion coefficient, and the role of velocity in mixing. The lesson also explores the concept of longitudinal and transverse dispersion in an infinite porous medium. It further delves into the concept of dispersivity and its relevance in porous media literature and software. The lesson concludes with a discussion on two-dimensional dispersion and the concept of flow through a fracture in a porous medium.

Video Highlights

00:38 - Explanation of dispersion of solute or tracer in porous media
01:34 - Exploration of longitudinal and transverse dispersion in an infinite porous medium
10:54 - Discussion on two-dimensional dispersion
14:53 - Understanding flow through a fracture in a porous medium

Key Takeaways

- The flow through porous media involves miscible displacement and mixing.
- The dispersion of solute or tracer in porous media is influenced by the dispersion coefficient and velocity.
- In an infinite porous medium, there are two types of dispersion coefficients: longitudinal and transverse.
- Dispersivity, defined as the longitudinal dispersion coefficient divided by interstitial velocity, is a crucial concept in porous media literature and software.
- Two-dimensional dispersion involves both longitudinal and transverse dispersion.
- Flow through a fracture in a porous medium can be understood in terms of linear and bilinear flows.