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摘要
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The physics of liquids in porous media gives rise to many interesting phenomena, including imbibition where a viscous fluid displaces a less viscous one. Here we discuss the theoretical and experimental progress made in recent years in this field. The emphasis is on an interfacial description, akin to the focus of a statistical physics approach. Coarse-grained equations of motion have been recently presented in the literature. These contain terms that take into account the pertinent features of imbibition: non-locality and the quenched noise that arises from the random environment, fluctuations of the fluid flow and capillary forces. The theoretical progress has highlighted the presence of intrinsic length-scales that invalidate scale invariance often assumed to be present in kinetic roughening processes such as that of a two-phase boundary in liquid penetration. Another important fact is that the macroscopic fluid flow, the kinetic roughening properties, and the effective noise in the problem are all coupled. Many possible deviations from simple scaling behaviour exist, and we outline the experimental evidence. Finally, prospects for further work, both theoretical and experimental, are discussed.
Keyword:
BEAD POROUS-MEDIA
SELF-ORGANIZED CRITICALITY
COMPRESSIBLE FIBER MATS
LIQUID CAPILLARY RISE
DYNAMIC CONTACT-ANGLE
PORE-NETWORK MODELS
NON-NEWTONIAN FLUID
2-PHASE FLOW
MAGNETIC-RESONANCE
RELATIVE PERMEABILITY
期刊
IF:
13.8
论文数:
546
被引数:
6.3K
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