Effect of dead-end pores on anomalous transport in porous media
- University of Lausanne, Switzerland (ankurdeep.bordoloi@unil.ch)
Heterogeneity in porous media may occur due to non-uniformity in the sizes or the shapes of grains that comprise the medium. We investigate the transport of colloids in a heterogeneous porous medium engineered in microuidic channels and featuring complex grain structures. Using experiment and numerical simulation, we investigate the velocity fields and the breakthrough curves of colloidal transport in a model porous medium by emphasising on the effects of dead-end pores. We characterize the porous structure via image processing and isolate dead-end sites from the remaining pore spaces. The study reveals complex flow structures inside dead-end sites that contribute to the small-scale velocity and long tails in the breakthrough curve. We provide a statistical model to capture the complex dynamics of the breakthrough curve.
How to cite: Bordoloi, A., Scheidweiler, D., and de Anna, P.: Effect of dead-end pores on anomalous transport in porous media, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-16218, https://doi.org/10.5194/egusphere-egu21-16218, 2021.