Flow regimes for fluid injection into a confined porous medium
Abstract
We report theoretical and numerical studies of the flow behaviour when a fluid is injected into a confined porous medium saturated with another fluid of different density and viscosity. For a two-dimensional configuration with point source injection, a nonlinear convection–diffusion equation is derived to describe the time evolution of the fluid–fluid interface. In the early time period, the fluid motion is mainly driven by the buoyancy force and the governing equation is reduced to a nonlinear diffusion equation with a well-known self-similar solution. In the late time period, the fluid flow is mainly driven by the injection, and the governing equation is approximated by a nonlinear hyperbolic equation that determines the global spreading rate; a shock solution is obtained when the injected fluid is more viscous than the displaced fluid, whereas a rarefaction wave solution is found when the injected fluid is less viscous. In the late time period, we also obtain analytical solutions including the diffusive term associated with the buoyancy effects (for an injected fluid with a viscosity higher than or equal to that of the displaced fluid), which provide the structure of the moving front. Numerical simulations of the convection–diffusion equation are performed; the various analytical solutionsmore »
- Authors:
-
- Princeton Univ., NJ (United States)
- Princeton Univ., NJ (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1215503
- Report Number(s):
- LA-UR-14-23552
Journal ID: ISSN 0022-1120; applab; PII: S0022112015000683
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Fluid Mechanics
- Additional Journal Information:
- Journal Volume: 767; Journal ID: ISSN 0022-1120
- Publisher:
- Cambridge University Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; 97 MATHEMATICS AND COMPUTING; geophysical and geological flows; gravity currents; porous media
Citation Formats
Zheng, Zhong, Guo, Bo, Christov, Ivan C., Celia, Michael A., and Stone, Howard A. Flow regimes for fluid injection into a confined porous medium. United States: N. p., 2015.
Web. doi:10.1017/jfm.2015.68.
Zheng, Zhong, Guo, Bo, Christov, Ivan C., Celia, Michael A., & Stone, Howard A. Flow regimes for fluid injection into a confined porous medium. United States. https://doi.org/10.1017/jfm.2015.68
Zheng, Zhong, Guo, Bo, Christov, Ivan C., Celia, Michael A., and Stone, Howard A. Tue .
"Flow regimes for fluid injection into a confined porous medium". United States. https://doi.org/10.1017/jfm.2015.68. https://www.osti.gov/servlets/purl/1215503.
@article{osti_1215503,
title = {Flow regimes for fluid injection into a confined porous medium},
author = {Zheng, Zhong and Guo, Bo and Christov, Ivan C. and Celia, Michael A. and Stone, Howard A.},
abstractNote = {We report theoretical and numerical studies of the flow behaviour when a fluid is injected into a confined porous medium saturated with another fluid of different density and viscosity. For a two-dimensional configuration with point source injection, a nonlinear convection–diffusion equation is derived to describe the time evolution of the fluid–fluid interface. In the early time period, the fluid motion is mainly driven by the buoyancy force and the governing equation is reduced to a nonlinear diffusion equation with a well-known self-similar solution. In the late time period, the fluid flow is mainly driven by the injection, and the governing equation is approximated by a nonlinear hyperbolic equation that determines the global spreading rate; a shock solution is obtained when the injected fluid is more viscous than the displaced fluid, whereas a rarefaction wave solution is found when the injected fluid is less viscous. In the late time period, we also obtain analytical solutions including the diffusive term associated with the buoyancy effects (for an injected fluid with a viscosity higher than or equal to that of the displaced fluid), which provide the structure of the moving front. Numerical simulations of the convection–diffusion equation are performed; the various analytical solutions are verified as appropriate asymptotic limits, and the transition processes between the individual limits are demonstrated.},
doi = {10.1017/jfm.2015.68},
journal = {Journal of Fluid Mechanics},
number = ,
volume = 767,
place = {United States},
year = {Tue Feb 24 00:00:00 EST 2015},
month = {Tue Feb 24 00:00:00 EST 2015}
}
Web of Science
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