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Dynamic capillary pressure in porous media : origin of the viscous-fingering length scale
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Weitz, D. A. , Stokes, J., Ball, R. C. and Kushnick, A.. (1987) Dynamic capillary pressure in porous media : origin of the viscous-fingering length scale. Physical Review Letters, Vol.59 (No.26). pp. 2967-2970. ISSN 0031-9007
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.59.2967
Abstract
We measure the velocity dependence of the capillary pressure, ΔPc(v), between two fluids in a porous medium. At zero velocity, the interface is pinned, and a critical ΔPc must be achieved before the interface moves. For nonzero velocities, there is an additional dynamic component to ΔPc, which scales as v1/2 when a wetting fluid displaces a nonwetting fluid. We suggest that this dynamic component of ΔPc can stabilize viscous fingers, and obtain excellent agreement with experiment.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Physics |
| Library of Congress Subject Headings (LCSH): | Viscosity, Viscous flow, Porous materials, Capillaries -- Permeability |
| Journal or Publication Title: | Physical Review Letters |
| Publisher: | American Physical Society |
| ISSN: | 0031-9007 |
| Date: | 1987 |
| Volume: | Vol.59 |
| Number: | No.26 |
| Page Range: | pp. 2967-2970 |
| Identification Number: | 10.1103/PhysRevLett.59.2967 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/39431 |
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