Effect of Capillary Element Aspect Ratio on the Dynamic Imbibition within Porous Networks

Ridgway, Cathy J.; Gane, Patrick; Schoelkopf, Joachim

doi:10.1006/jcis.2002.8468

Cited by 87 publications

(90 citation statements)

References 37 publications

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“…The aspect ratio of the throatlike features is an important parameter in the response to this wetting algorithm. The work of Sorbie et al (1995) dealing with pore doublets is discussed in detail by Ridgway et al (2002a) and extended by them to the 3D interconnectivity provided by the network model.…”

Section: The Wetting Algorithmmentioning

confidence: 99%

“…The absorption algorithm was applied to these two structures using the properties of water (surface energy, γ = 0.07275 N m −1 , contact angle, θ = 0 • , viscosity, η = 0.001 kg m −1 s −1 and Figure 5. Numerical short-time absorption for coarse and fine broad pore size distributions at similar porosity (Ridgway et al, 2002a). density, ρ = 998 kg m −3 ). It can be seen in Figure 5, in which the volume of liquid absorbed, V, traversing a cross-sectional area, A, in a structure of porosity, φ, is plotted against the square root of time, that the rate of absorption at the shortest times favours the finer structure whereas at larger times it favours the coarser structure, both at similar porosity.…”

Section: The Wetting Algorithmmentioning

confidence: 99%

See 1 more Smart Citation

Water Absorption into Construction Materials: Comparison of Neutron Radiography Data with Network Absorption Models

Ridgway¹,

Gane²,

El³

et al. 2006

Transp Porous Med

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Two different porous building materials have been previously measured and analysed (El-Abd and Milczarek, 2004, IEEE Trans. Nuclear Sci.; El-Abd et al., 2004, J. Phys. D) using neutron radiography to measure the water front position over time. The results from this experimental approach show a similar behaviour to the predictions from idealised model structures, in that there is a cross over point where the fastest rate of absorption at first favours the finer structure material and at later times favours the coarser pore structure material. The computer model, Pore-Cor is used to generate the idealised structures and the absorption of fluid into porous structures follows a Bosanquet wetting algorithm for fluids undergoing both inertial and viscous dynamical flow (Ridgway and Gane, 2002, Colloids Surfaces A: Physicochem. Eng. Aspects 206, 217-239.). The model structures comprise cubic pores connected by cylindrical throats on a threedimensional 10 × 10 × 10 position matrix simulating the void structure of porous media by fitting as closely as possible the modelled mercury intrusion curve to that of the experimentally determined mercury intrusion curve of the actual sample. They show the transition that occurs in the absorption behaviour from the linear t-dependent short timescale inertial regime to the familiar √ t Lucas-Washburn viscous regime. The simulated absorption algorithm applied to these model structures also shows a fluid position behaviour that replicates qualitatively, given the limitation of representative sample volume, the cross over seen experimentally. Furthermore, the existence of a preferred wetting path is demonstrated in the experimental as well as the model wetting front behaviour. In the case of the structure containing the broader range of pore sizes, the wetting front is considered to proceed by a network of optimal size combinations (inertial wetting versus viscous drag) and connectivity, leaving some pores behind the wetting front unfilled or only partially filled.

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Section: The Wetting Algorithmmentioning

confidence: 99%

Section: The Wetting Algorithmmentioning

confidence: 99%

Water Absorption into Construction Materials: Comparison of Neutron Radiography Data with Network Absorption Models

Ridgway¹,

Gane²,

El³

et al. 2006

Transp Porous Med

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“…(17)) [281,299]. But inertia can also be important at all stages of the capillary invasion, whenever a sudden change in the flow occurs, as in film snap-off, or pinch-off at a corner.…”

Section: Pore Geometry and Inertiamentioning

confidence: 99%

“…Other dynamical aspects (behaviour of residual gas pockets related to saturation, prewetting layers, Bosanquet-flow -see Section IV) can also be added [25,32,49,52,63,238,279,281,298]. Simulations can be either quasi-staticthe dynamics is applied at the "weakest link", and no other processes are allowed -or dynamic so that the pressure balance is maintained dynamically at the single pore level [29,30,51,65,74,136,157,238].…”

Section: F Microscopic Simulationsmentioning

confidence: 99%

Imbibition in disordered media

Alava

Dubé

Rost

2004

Advances in Physics

288

333

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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.

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“…Szekely et al [8], examined single capillaries based on a revised boundary-condition model to account for the initial start of imbibition, and Sorbie et al [9] who reviewed and applied Szekely's work to examine the effects of comparative imbibition into a parallel pore-doublet. We extended this work previously for a three-dimensional network [10], and now go on to discuss our observations of non-Lucas-Washburn behaviour and the influence of inertial wetting criteria in bi-modal separable structures.…”

Section: Introductionmentioning

confidence: 89%

Modified calcium carbonate coatings with rapid absorption and extensive liquid uptake capacity

Ridgway¹,

Gane²,

Schoelkopf³

2004

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Effect of Capillary Element Aspect Ratio on the Dynamic Imbibition within Porous Networks

Cited by 87 publications

References 37 publications

Water Absorption into Construction Materials: Comparison of Neutron Radiography Data with Network Absorption Models

Water Absorption into Construction Materials: Comparison of Neutron Radiography Data with Network Absorption Models

Imbibition in disordered media

Modified calcium carbonate coatings with rapid absorption and extensive liquid uptake capacity

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