Role of wettability in the break-up of liquid films inside constricted capillaries
To understand the role of wettability on gas-foam generation in porous media, this work considers the effect of conjoining/disjoining pressure on the dynamics of a liquid film forming an unstable collar in both straight and constructed cylindrical capillaries. A hydrodynamic lubrication analysis is presented to describe the time evolution of a thin viscous film under the influence of surface tension and the conjoining or disjoining forces. Time to break-up depends on the pore shape, the strength of the conjoining/disjoining forces, the initial film thickness, and also, on the fluid viscosity, interfacial tension, and unconstricted pore radius which combine to form a characteristic scaling time. Results show that both conjoining (intermediate wettability) and disjoining (strongly wetting) forces inhibit break-up. 33 refs., 9 figs., 1 tab.
- Research Organization:
- California Univ., Berkeley (USA). Dept. of Chemical Engineering; Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6975161
- Report Number(s):
- LBL-21804; CONF-850942-58; ON: DE87001880
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
BUBBLES
COLLOIDS
DIMENSIONS
DISPERSIONS
FILMS
FLUID FLOW
FLUID MECHANICS
FLUIDS
FOAMS
GASES
HYDRODYNAMICS
INTERFACES
MATERIALS
MECHANICS
NUMERICAL SOLUTION
POROUS MATERIALS
SURFACE PROPERTIES
SURFACE TENSION
THICKNESS
TWO-PHASE FLOW
VISCOSITY
WETTABILITY