Dispersion and Stretching in 3D Porous Media

Explore the complex world of fluid dynamics in porous media through this 37-minute lecture by Dr. Mathieu Souzy, a Research Associate at INRAE. Delve into the mechanisms controlling flow kinematics at the pore scale and their impact on dispersion and mixing processes. Learn about innovative experimental techniques, including index matching, that enable direct visualization of flow in transparent artificial porous media. Discover how Particle Image Velocimetry (PIV) is used to reconstruct 3D Eulerian fluid velocity fields in randomly packed monodisperse spheres. Examine the stretching and dispersion processes of dye blobs in 3D porous media, and gain insights into the phenomenon of anomalous dispersion. Follow the lecture's progression from introduction to experimental setup, postprocessing techniques, and analysis of both experimental and numerical results. Conclude with a summary, project discussion, and future research directions in this fascinating field of geomaterial fluid dynamics.

Introduction
What is mixing
Dispersion stretching
Experimental setup
Performing a size
Postprocessing
Historial Reconstruction
Stretching Law
Dispersion
Experimental results
Numerical results
Velocity distribution
Dispersion process
Continuous time random walk
Summary
Project
Future work