In this work, we provide a physically-consistent modeling approach for two-phase porous media flow, by including percolating interfacial area and saturation as state variables. For this purpose, we combine two continuum theories for two-phase flow which have been individually proven to be conditionally valid. This means the potential use of the connected-to-the-flow interfacial area as a state variable is tested utilizing time-resolved microfluidic experiments, for various flux boundary conditions. Moreover, we observe and study a linear relation between the percolating saturation and interfacial area, which is persistent for the tested boundary conditions. In our microfluidic experiments, we employ optical microscopy to perform cyclic immiscible displacement experiments. Our results show that a continuum model, where capillary pressure, saturation , and specific interfacial area of the clusters connected to the flow are considered, is closer to a universal description of two-phase flow than the common approaches, where the only state variable is saturation.
%0 Journal Article
%1 VAHIDDASTJERDI2023104378
%A Vahid Dastjerdi, Samaneh
%A Karadimitriou, Nikolaos
%A Hassanizadeh, S. Majid
%A Steeb, Holger
%D 2023
%J Advances in Water Resources
%K mib_ls2 mib_ls2_PML mib_ls2_PML_micro mib_ls2_SFB1313_Z02 mib_ls2_exc2075_PN1 mib_ls2_exc2075_PN1_PN1_1_4 myown
%P 104378
%R https://doi.org/10.1016/j.advwatres.2023.104378
%T Experimental evaluation of fluid connectivity in two-phase flow in porous media
%U https://www.sciencedirect.com/science/article/pii/S0309170823000131
%V 172
%X In this work, we provide a physically-consistent modeling approach for two-phase porous media flow, by including percolating interfacial area and saturation as state variables. For this purpose, we combine two continuum theories for two-phase flow which have been individually proven to be conditionally valid. This means the potential use of the connected-to-the-flow interfacial area as a state variable is tested utilizing time-resolved microfluidic experiments, for various flux boundary conditions. Moreover, we observe and study a linear relation between the percolating saturation and interfacial area, which is persistent for the tested boundary conditions. In our microfluidic experiments, we employ optical microscopy to perform cyclic immiscible displacement experiments. Our results show that a continuum model, where capillary pressure, saturation , and specific interfacial area of the clusters connected to the flow are considered, is closer to a universal description of two-phase flow than the common approaches, where the only state variable is saturation.
@article{VAHIDDASTJERDI2023104378,
abstract = {In this work, we provide a physically-consistent modeling approach for two-phase porous media flow, by including percolating interfacial area and saturation as state variables. For this purpose, we combine two continuum theories for two-phase flow which have been individually proven to be conditionally valid. This means the potential use of the connected-to-the-flow interfacial area as a state variable is tested utilizing time-resolved microfluidic experiments, for various flux boundary conditions. Moreover, we observe and study a linear relation between the percolating saturation and interfacial area, which is persistent for the tested boundary conditions. In our microfluidic experiments, we employ optical microscopy to perform cyclic immiscible displacement experiments. Our results show that a continuum model, where capillary pressure, saturation , and specific interfacial area of the clusters connected to the flow are considered, is closer to a universal description of two-phase flow than the common approaches, where the only state variable is saturation.},
added-at = {2023-02-14T12:30:34.000+0100},
author = {{Vahid Dastjerdi}, Samaneh and Karadimitriou, Nikolaos and Hassanizadeh, S. Majid and Steeb, Holger},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2afbd9283d6294035a1bdb96e9b5d1e5d/nkaradimitriou},
doi = {https://doi.org/10.1016/j.advwatres.2023.104378},
interhash = {be0911edece60c5c0b8d6ce35ed9ae2f},
intrahash = {afbd9283d6294035a1bdb96e9b5d1e5d},
issn = {0309-1708},
journal = {Advances in Water Resources},
keywords = {mib_ls2 mib_ls2_PML mib_ls2_PML_micro mib_ls2_SFB1313_Z02 mib_ls2_exc2075_PN1 mib_ls2_exc2075_PN1_PN1_1_4 myown},
pages = 104378,
timestamp = {2023-11-17T17:29:24.000+0100},
title = {Experimental evaluation of fluid connectivity in two-phase flow in porous media},
url = {https://www.sciencedirect.com/science/article/pii/S0309170823000131},
volume = 172,
year = 2023
}
