Dynamic capillary pressure in porous media : origin of the viscous-fingering length scale
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 0031-9007Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevLett.59.2967
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|
|Page Range:||pp. 2967-2970|
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