Details
| Original language | English |
|---|---|
| Title of host publication | Upscaling Multiphase Flow in Porous Media |
| Subtitle of host publication | From Pore to Core and Beyond |
| Publisher | Springer Netherlands |
| Pages | 237-257 |
| Number of pages | 21 |
| ISBN (print) | 1402035136, 9781402035135 |
| Publication status | Published - 2005 |
| Externally published | Yes |
Abstract
Intrinsic heterogeneities influence the multi-phase flow behavior of a dense non-aqueous phase liquids (DNAPL) infiltrating into a natural soil. Typically, we cannot resolve the scale of these heterogeneities so that upscaling techniques are required. The choice of the appropriate upscaling method depends on the averaging scale, since the relative importance of capillary and gravity forces change with scale. We present an easy and quick upscaling approach for cases in which the flow on the length-scale of heterogeneities is dominated by capillary forces. The approach is based on a percolation model and a single-phase flow-averaging method. We apply the upscaling approach to experimental data of a DNAPL infiltration into a sandbox with artificial sand lenses. The anisotropy of the structure results in anisotropic flow which is amplified by the nonlinear behavior of multi-phase flow. The residual saturation depends on the direction of flow, and the anisotropy ratio of the effective permeability is a function of the DNAPL saturation. Furthermore, it appears necessary to regard the relative permeability-saturation relationship as a tensor property rather than a scalar. The overall flow behavior simulated by the upscaled model agrees well with simulations accounting for the distinct lenses and the experimental data.
ASJC Scopus subject areas
- Environmental Science(all)
- General Environmental Science
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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Upscaling Multiphase Flow in Porous Media: From Pore to Core and Beyond. Springer Netherlands, 2005. p. 237-257.
Research output: Chapter in book/report/conference proceeding › Contribution to book/anthology › Research › peer review
}
TY - CHAP
T1 - Upscaling of two-phase flow processes in porous media
AU - Eichel, Hartmut
AU - Helmig, Rainer
AU - Neuweiler, Insa
AU - Cirpka, Olaf A.
PY - 2005
Y1 - 2005
N2 - Intrinsic heterogeneities influence the multi-phase flow behavior of a dense non-aqueous phase liquids (DNAPL) infiltrating into a natural soil. Typically, we cannot resolve the scale of these heterogeneities so that upscaling techniques are required. The choice of the appropriate upscaling method depends on the averaging scale, since the relative importance of capillary and gravity forces change with scale. We present an easy and quick upscaling approach for cases in which the flow on the length-scale of heterogeneities is dominated by capillary forces. The approach is based on a percolation model and a single-phase flow-averaging method. We apply the upscaling approach to experimental data of a DNAPL infiltration into a sandbox with artificial sand lenses. The anisotropy of the structure results in anisotropic flow which is amplified by the nonlinear behavior of multi-phase flow. The residual saturation depends on the direction of flow, and the anisotropy ratio of the effective permeability is a function of the DNAPL saturation. Furthermore, it appears necessary to regard the relative permeability-saturation relationship as a tensor property rather than a scalar. The overall flow behavior simulated by the upscaled model agrees well with simulations accounting for the distinct lenses and the experimental data.
AB - Intrinsic heterogeneities influence the multi-phase flow behavior of a dense non-aqueous phase liquids (DNAPL) infiltrating into a natural soil. Typically, we cannot resolve the scale of these heterogeneities so that upscaling techniques are required. The choice of the appropriate upscaling method depends on the averaging scale, since the relative importance of capillary and gravity forces change with scale. We present an easy and quick upscaling approach for cases in which the flow on the length-scale of heterogeneities is dominated by capillary forces. The approach is based on a percolation model and a single-phase flow-averaging method. We apply the upscaling approach to experimental data of a DNAPL infiltration into a sandbox with artificial sand lenses. The anisotropy of the structure results in anisotropic flow which is amplified by the nonlinear behavior of multi-phase flow. The residual saturation depends on the direction of flow, and the anisotropy ratio of the effective permeability is a function of the DNAPL saturation. Furthermore, it appears necessary to regard the relative permeability-saturation relationship as a tensor property rather than a scalar. The overall flow behavior simulated by the upscaled model agrees well with simulations accounting for the distinct lenses and the experimental data.
UR - http://www.scopus.com/inward/record.url?scp=79951943514&partnerID=8YFLogxK
U2 - 10.1007/1-4020-3604-3_12
DO - 10.1007/1-4020-3604-3_12
M3 - Contribution to book/anthology
AN - SCOPUS:79951943514
SN - 1402035136
SN - 9781402035135
SP - 237
EP - 257
BT - Upscaling Multiphase Flow in Porous Media
PB - Springer Netherlands
ER -