Non-Newtonian Flow Through Porous Media

Savins, J.G.

doi:10.1021/ie50718a005

Cited by 254 publications

(169 citation statements)

References 67 publications

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“…Thus the concept of a ratio of characteristic times emerges as an ordering parameter in viscoelastic flow through porous media. This indicates the importance of the ratio of the natural time of a fluid to the duration time of a process [10]. It is noteworthy that this formulation relies on a twofold ordering scheme and is valid for some systems and flow regimes.…”

Section: Steady-state Time-dependencementioning

confidence: 94%

“…Figures (10) and (11) compare the shear viscosity to the extensional viscosity at isothermal condition for a typical viscoelastic fluid at various shear and extension rates. As seen in Figure (10), the shear viscosity curve can be divided into three regions.…”

Section: Extensional Flowmentioning

confidence: 99%

“…This kind of observation indicates deposition of polymer on the solid surface by one mechanism or another, and cast doubt on some explanations which involve elasticity. At constant flow rate the increased pressure drop seems to provide the necessary force to keep a reproducible portion of the flow channels open [10,38,103,112].…”

Section: Viscoelastic Effects In Porous Mediamentioning

confidence: 99%

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Flow of non‐newtonian fluids in porous media

Sochi

2010

J Polym Sci B Polym Phys

123

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The study of flow of non‐Newtonian fluids in porous media is very important and serves a wide variety of practical applications in processes such as enhanced oil recovery from underground reservoirs, filtration of polymer solutions and soil remediation through the removal of liquid pollutants. These fluids occur in diverse natural and synthetic forms and can be regarded as the rule rather than the exception. They show very complex strain and time dependent behavior and may have initial yield‐stress. Their common feature is that they do not obey the simple Newtonian relation of proportionality between stress and rate of deformation. Non‐Newtonian fluids are generally classified into three main categories: time‐independent whose strain rate solely depends on the instantaneous stress, time‐dependent whose strain rate is a function of both magnitude and duration of the applied stress and viscoelastic which shows partial elastic recovery on removal of the deforming stress and usually demonstrates both time and strain dependency. In this article, the key aspects of these fluids are reviewed with particular emphasis on single‐phase flow through porous media. The four main approaches for describing the flow in porous media are examined and assessed. These are: continuum models, bundle of tubes models, numerical methods and pore‐scale network modeling. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2010

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Section: Steady-state Time-dependencementioning

confidence: 94%

Section: Extensional Flowmentioning

confidence: 99%

Section: Viscoelastic Effects In Porous Mediamentioning

confidence: 99%

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Flow of non‐newtonian fluids in porous media

Sochi

2010

J Polym Sci B Polym Phys

123

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“…Each sample of a model of porous medium is in itself somewhat unique in geometric morphology, and there are formidable problems in precisely defining the flow conditions existing within any particular structure. Several of the published investigations concerned with more fundamental aspects of the flow of non-Newtonian fluids through porous media involved the use of unconsolidated models (Savins 1969). For developing this study, we also used an unconsolidated packed bed of sand as a porous medium.…”

Section: Introductionmentioning

confidence: 99%

Microfluidic systems for the analysis of viscoelastic fluid flow phenomena in porous media

Galindo-Rosales

Campo-Deaño

Pinho

et al. 2011

Microfluid Nanofluid

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The Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. RESEARCH PAPERMicrofluidic systems for the analysis of viscoelastic fluid flow phenomena in porous media Abstract In this study, two microfluidic devices are proposed as simplified 1-D microfluidic analogues of a porous medium. The objectives are twofold: firstly to assess the usefulness of the microchannels to mimic the porous medium in a controlled and simplified manner, and secondly to obtain a better insight about the flow characteristics of viscoelastic fluids flowing through a packed bed. For these purposes, flow visualizations and pressure drop measurements are conducted with Newtonian and viscoelastic fluids. The 1-D microfluidic analogues of porous medium consisted of microchannels with a sequence of contractions/expansions disposed in symmetric and asymmetric arrangements. The real porous medium is in reality, a complex combination of the two arrangements of particles simulated with the microchannels, which can be considered as limiting ideal configurations. The results show that both configurations are able to mimic well the pressure drop variation with flow rate for Newtonian fluids. However, due to the intrinsic differences in the deformation rate profiles associated with each microgeometry, the symmetric configuration is more suitable for studying the flow of viscoelastic fluids at low De values, while the asymmetric configuration provides better results at high De values. In this way, both microgeometries seem to be complementary and could be interesting tools to obtain a better insight about the flow of viscoelastic fluids through a porous medium. Such model systems could be very interesting to use in polymer-flood processes for enhanced oil recovery, for instance, as a tool for selecting the most suitable viscoelastic fluid to be used in a specific formation. The selection of the fluid properties of a detergent for cleaning oil contaminated soil, sand, and in general, any porous material, is another possible application.

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“…The application within permeable flow-particularly the extremely non-regular anisotropic oil reservoirs-is more problematic because of a lack of a mapping of permeability to the shear rate (and thus to the generated viscosity change which determines the flow). General relationships between shear rate and permeability remain a relatively obscure area of fluids engineering (Dullien 1979;Savins 1970;Greenkorn 1983). There is no clear way of associating a permeability and the shear rate in a rock pore generated by an applied pressure gradient.…”

Section: Figmentioning

confidence: 99%

Shear Rate and Permeability in Water Flooding

Reuvers

Golombok

2008

Transp Porous Med

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Water breakthrough during oil recovery can be inhibited by the use of novel shear-induced structure additives. These affect the shear rate experienced by fluid inside the rock matrix. We relate this to the permeability for the purpose of applying these novel non-Newtonian materials which thicken viscosity only in the shear range associated with the permeability of the reservoir while maintaining base fluid properties outside this range.

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Non-Newtonian Flow Through Porous Media

Cited by 254 publications

References 67 publications

Flow of non‐newtonian fluids in porous media

Flow of non‐newtonian fluids in porous media

Microfluidic systems for the analysis of viscoelastic fluid flow phenomena in porous media

Shear Rate and Permeability in Water Flooding

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