Influence of capillary end effects on steadystate relative permeability estimates from direct porescale simulations
In this study, we investigate and characterize the influence of capillary end effects on steadystate relative permeabilities obtained in porescale numerical simulations of twophase flows. Our study is motivated by the observation that capillary end effects documented in twophase laboratoryscale experiments can significantly influence permeability estimates. While numerical simulations of twophase flows in reconstructed porespaces are increasingly employed to characterize relative permeabilities, a phenomenon which is akin to capillary end effects can also arise in such analyses due to the constraints applied at the boundaries of the computational domain. We profile the relative strength of these capillary end effects on the calculation of steadystate relative permeabilities obtained within randomly generated porous microstructures using a finite volumebased twophase flow solver. Finally, we suggest a procedure to estimate the extent of the regions influenced by these capillary end effects, which in turn allows for the alleviation of bias in the estimation of relative permeabilities.
 Authors:

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 Politecnico di Milano (Italy). Dipartimento di Energia
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Politecnico di Milano (Italy). Dipartimento di Ingegneria Civile e Ambientale; Univ. of Arizona, Tucson, AZ (United States)
 Publication Date:
 Report Number(s):
 LAUR1725509
Journal ID: ISSN 10706631
 Grant/Contract Number:
 AC5206NA25396; 20150763PRD4
 Type:
 Accepted Manuscript
 Journal Name:
 Physics of Fluids
 Additional Journal Information:
 Journal Volume: 29; Journal Issue: 12; Journal ID: ISSN 10706631
 Publisher:
 American Institute of Physics (AIP)
 Research Org:
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Sponsoring Org:
 USDOE Laboratory Directed Research and Development (LDRD) Program
 Country of Publication:
 United States
 Language:
 English
 Subject:
 97 MATHEMATICS AND COMPUTING; 42 ENGINEERING
 OSTI Identifier:
 1467331
 Alternate Identifier(s):
 OSTI ID: 1415061
Guédon, Gaël Raymond, Hyman, Jeffrey De’Haven, Inzoli, Fabio, Riva, Monica, and Guadagnini, Alberto. Influence of capillary end effects on steadystate relative permeability estimates from direct porescale simulations. United States: N. p.,
Web. doi:10.1063/1.5009075.
Guédon, Gaël Raymond, Hyman, Jeffrey De’Haven, Inzoli, Fabio, Riva, Monica, & Guadagnini, Alberto. Influence of capillary end effects on steadystate relative permeability estimates from direct porescale simulations. United States. doi:10.1063/1.5009075.
Guédon, Gaël Raymond, Hyman, Jeffrey De’Haven, Inzoli, Fabio, Riva, Monica, and Guadagnini, Alberto. 2017.
"Influence of capillary end effects on steadystate relative permeability estimates from direct porescale simulations". United States.
doi:10.1063/1.5009075. https://www.osti.gov/servlets/purl/1467331.
@article{osti_1467331,
title = {Influence of capillary end effects on steadystate relative permeability estimates from direct porescale simulations},
author = {Guédon, Gaël Raymond and Hyman, Jeffrey De’Haven and Inzoli, Fabio and Riva, Monica and Guadagnini, Alberto},
abstractNote = {In this study, we investigate and characterize the influence of capillary end effects on steadystate relative permeabilities obtained in porescale numerical simulations of twophase flows. Our study is motivated by the observation that capillary end effects documented in twophase laboratoryscale experiments can significantly influence permeability estimates. While numerical simulations of twophase flows in reconstructed porespaces are increasingly employed to characterize relative permeabilities, a phenomenon which is akin to capillary end effects can also arise in such analyses due to the constraints applied at the boundaries of the computational domain. We profile the relative strength of these capillary end effects on the calculation of steadystate relative permeabilities obtained within randomly generated porous microstructures using a finite volumebased twophase flow solver. Finally, we suggest a procedure to estimate the extent of the regions influenced by these capillary end effects, which in turn allows for the alleviation of bias in the estimation of relative permeabilities.},
doi = {10.1063/1.5009075},
journal = {Physics of Fluids},
number = 12,
volume = 29,
place = {United States},
year = {2017},
month = {12}
}