Temperature Effect on Power for Particle Detachment from Pore Wall Described by an Arrhenius-Type Equation

Civan, Faruk

doi:10.1007/s11242-006-9005-3

Cited by 22 publications

(19 citation statements)

References 17 publications

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“…Hence, colder temperature conditions are favorable for more pore surface attachment and deposition of fine particles (Civan 2007b). Conversely, at sufficiently high temperatures, pore surface conditions become more suitable for particle detachment, and therefore fine particles are less likely to deposit over the pore surface, and rather migrate towards the pore throats and form particle bridges but only under favorable conditions (Pandya et al 1998;Civan 2007a;Tran et al 2009).…”

Section: Superscripts O Initial Condition 1 Introductionmentioning

confidence: 99%

“…Another issue of importance is that particulate processes occurring in porous media should be related to the interstitial fluid velocity rather than the pore velocity, volumetric flux or flow rate because the fluid forces acting upon particles in porous media are determined by the actual fluid velocity in tortuous preferential fluid flow paths, referred to as the interstitial fluid velocity (Dupuit 1863;Civan 2007b). Fine particles present in tortuous flow paths are drifted more effectively along with the flowing fluid because the fluid moves faster in tortuous paths than in straight paths (Civan 2007b(Civan , 2008d.…”

Section: Superscripts O Initial Condition 1 Introductionmentioning

confidence: 99%

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Non-isothermal Permeability Impairment by Fines Migration and Deposition in Porous Media including Dispersive Transport

Civan

2010

Transp Porous Med

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107

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Particle migration and deposition, and resulting permeability impairment occurring in porous media are described by a practical phenomenological model considering temperature variation and particle transport by advection and dispersion. Variation of the filter coefficient and permeability of porous matrix by temperature and particle deposition, and other essential factors are considered by means of the special correlations of the relevant variables and dimensionless numbers. Comparison of the numerical results, obtained using a finite-difference numerical scheme with and without considering the dispersion mechanism and temperature variation, reveals the significance of such effects on fines migration and deposition, and consequent permeability impairment in porous media. Improved model presented in this article can be instrumental for scientifically guided experimentation, analysis, and optimal design of processes involving in transport of colloidal and fine particles through geological subsurface formations.

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Section: Superscripts O Initial Condition 1 Introductionmentioning

confidence: 99%

Section: Superscripts O Initial Condition 1 Introductionmentioning

confidence: 99%

Non-isothermal Permeability Impairment by Fines Migration and Deposition in Porous Media including Dispersive Transport

Civan

2010

Transp Porous Med

Self Cite

107

View full text Add to dashboard Cite

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“…Nevertheless, it is altogether possible the recirculation generated by the expansion could reduce this effect since the higher bulk convection velocities and the larger shear stresses acting on the particles in the bulk under the vertical environment allows them to detach from the pore walls and travel further down the pore length, thus aiding deeper penetration into the scaffold. This has been observed widely in other flows through porous media (Civan, 2006). Enhanced diffusion due to Eckart streaming in tortuous substrates has also been reported (Haydock and Yeomans, 2003).…”

Section: Internal Flow Within the Scaffold Poresmentioning

confidence: 53%

“…The complexity of the flow, such as the recirculation observed, also stipulates that it is not possible to obtain a prediction for the empirical coefficient in the theoretical prediction in Equation (11). This is often the case when considering flow through porous media (Arshad et al, 1993;Civan, 2006). Nevertheless, the relatively good agreement between the slope of the theoretical prediction and the experimental data suggests that the lubrication model is a modest approximation for the internal flow through the pores, at least for a rough estimation of the speed at which the flow occurs.…”

Section: Internal Flow Within the Scaffold Poresmentioning

confidence: 86%

The dynamics of surface acoustic wave‐driven scaffold cell seeding

Bok

Yeo

et al. 2009

Biotech & Bioengineering

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Flow visualization using fluorescent microparticles and cell viability investigations are carried out to examine the mechanisms by which cells are seeded into scaffolds driven by surface acoustic waves. The former consists of observing both the external flow prior to the entry of the suspension into the scaffold and the internal flow within the scaffold pores. The latter involves micro-CT (computed tomography) scans of the particle distributions within the seeded scaffolds and visual and quantitative methods to examine the morphology and proliferation ability of the irradiated cells. The results of these investigations elucidate the mechanisms by which particles are seeded, and hence provide valuable information that form the basis for optimizing this recently discovered method for rapid, efficient, and uniform scaffold cell seeding. Yeast cells are observed to maintain their size and morphology as well as their proliferation ability over 14 days after they are irradiated. The mammalian primary osteoblast cells tested also show little difference in their viability when exposed to the surface acoustic wave irradiation compared to a control set. Together, these provide initial feasibility results that demonstrate the surface acoustic wave technology as a viable seeding method without risk of denaturing the cells.

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“…Baveye et al 1998) that cannot be easily measured, or that cannot be easily upscaled to the field pond scale and (ii) the rate at which clogging mechanisms jointly develop depends on a variety of site-specific conditions and factors, such as textural heterogeneities of the soil (e.g. pore or grain size distributions-PSD/GSD) (Zamani and Maini 2009;Tien and Payatakes 1979;Guin 1972), soil density heterogeneities (Clement et al 1996), chemical heterogeneity (Greskowiak et al 2005), and fluctuations of the water temperature (Civan 2007(Civan , 2010.…”

Section: Introductionmentioning

confidence: 99%

Combining physical-based models and satellite images for the spatio-temporal assessment of soil infiltration capacity

Pedretti

Fernàndez-García

Sánchez-Vila

et al. 2011

Stoch Environ Res Risk Assess

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The performance of managed artificial recharge (MAR) facilities by means of surface ponds (SP) is controlled by the temporal evolution of the global infiltration\ud capacity Ic of topsoils. Cost-effective maintenance operations that aim to maintain controlled infiltration values during the activity of the SP require the full knowledge of the spatio-temporal variability of Ic. This task is deemed uncertain. The natural reduction in time of Ic depends on\ud complex physical, biological and chemical reactions that clog the soil pores and has been observed to decay exponentially to an asymptotic non-zero value. Moreover, the\ud relative influence of single clogging processes depend on some initial parameters of the soil, such as the initial infiltration capacity (Ic,0). This property is also uncertain, as aquifers are typically heterogeneous and scarcely characterized in practical situations. We suggest a method to\ud obtain maps of Ic using a geostatistical approach, which is suitable to be extended to engineering risk assessment concerning management of SP facilities. We propose to\ud combine geostatistical inference and a temporally-lumped physical model to reproduce non-uniform clogging in topsoils of a SP, using field campaigns of local and large scale tests and additionally by means of satellite images as secondary information. We then postulate a power-law\ud relationship between the parameter of the exponential law, k, and Ic,0. It is found that calibrating the two parameters of the power law model it is possible to fit the temporal evolution of total infiltration rate at the pond scale in a MAR test facility. The results can be used to design\ud appropriate measures to selectively limit clogging during operation, extending the life of the infiltration pond.Peer ReviewedPostprint (published version

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Temperature Effect on Power for Particle Detachment from Pore Wall Described by an Arrhenius-Type Equation

Abstract: An Arrhenius-type asymptotic-exponential function is derived to describe the temperature dependence of the power needed for detachment of fine particles from pore walls in porous media.

Cited by 22 publications

References 17 publications

Non-isothermal Permeability Impairment by Fines Migration and Deposition in Porous Media including Dispersive Transport

Non-isothermal Permeability Impairment by Fines Migration and Deposition in Porous Media including Dispersive Transport

The dynamics of surface acoustic wave‐driven scaffold cell seeding

Combining physical-based models and satellite images for the spatio-temporal assessment of soil infiltration capacity

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