Speaker
Description
Geomaterials are complex porous materials presenting a wide diversity of structures, which set how a fluid will flow through it. The understanding of the mechanisms controlling the flow kinematics at the pore scale is however decisive to predict and control transport processes (dispersion and mixing). Using index matching techniques, one can develop transparent porous media to perform direct visualization of the flow in model porous media composed of randomly packed solid spheres, allowing to directly visualize the flow within the bulk of the 3-D media, and to investigate how a blob of dye stretches and get mixed when injected within such 3-D porous media. Using Particle Image Velocimetry techniques (PIV), successive scans of the velocity field are used to provide highly resolved experimental reconstruction of the 3-D Eulerian fluid velocity field. Using this experimental data set to validate numerical SPH simulations, we investigate numerically the effect of varying the pore size distribution over the velocity distributions and the dispersion process.
| References | Souzy M., Lhuissier H.,Méheust Y.,Le Borgne T., and Metzger B. «Velocity distributions, dispersion and stretching in three-dimensional porous media.» Journal of Fluid Mechanics, vol. 891 (2020). Chen, F., Sun, J., Wautier, A., & Souzy, M. (2025). Flow kinematics in three‐dimensional porous media of varying pore size distribution using smoothed particle hydrodynamics. Water Resources Research, 61(10), e2025WR040413. |
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| Country | France |
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