EGU21-3495, updated on 13 May 2022
https://doi.org/10.5194/egusphere-egu21-3495
EGU General Assembly 2021
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Pore-scale study of effects of surface roughness on the transport of interfacial reactive tracers during primary drainage process

Huhao Gao1, Alexandru Tatomir1,2, Nikolaos Karadimitriou3, Holger Steeb3,4, and Martin Sauter1
Huhao Gao et al.
  • 1Universität Göttingen, Geowissenschaftliches Zentrum, Abt. Angewandte Geologie, Göttingen, Germany (huhao.gao@uni-goettingen.de)
  • 2Department of Earth Sciences, Uppsala University, 752 36 Uppsala, Sweden.
  • 3Institute of Applied Mechanics (CE), University of Stuttgart, 70569 Stuttgart, Germany.
  • 4Stuttgart Center for Simulation Technology, Pfaffenwaldring 5a, 70569 Stuttgart, Germany

Porous media surface roughness strongly influences the transport of solutes during drainage, due to the formation of thick water films (capillary condensation) on the porous media surface. In the case of interfacial-reacted, water-based solutes, these water films increase both the production of the solute, due to the increased number of fluid-fluid interfaces, and the loss of the solute by the retention in the stagnant water films. The retention of the solute in flowing water is described by a mobile mass retention term. This study applies the pore-scale direct simulation with the phase-field method based continuous solute transport (PFM-CST) model on the kinetic interfacial sensitive (KIS) tracer reactive transport during primary drainage in a 2D slit with a wall with variable fractal geometries. The capillary-associated moving interface is found to be larger for rough surfaces than smoother ones. The results confirm that the impact of roughness regarding the film-associated interfacial area can be partly, or totally masked, in a drained slit. It is found that the mobile mass retention term is increased with larger volumes of capillary condensed water films. To conclude, it is also found that the surface roughness factor has a non-monotonic relationship with the overall production rate of solute mass in moving water.

How to cite: Gao, H., Tatomir, A., Karadimitriou, N., Steeb, H., and Sauter, M.: Pore-scale study of effects of surface roughness on the transport of interfacial reactive tracers during primary drainage process, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-3495, https://doi.org/10.5194/egusphere-egu21-3495, 2021.

Displays

Display file