A Stokesian dynamics model for particle deposition and bridging in granular media

Vitthal, Sanjay; Sharma, Mukul M.

doi:10.1016/0021-9797(92)90325-g

Cited by 45 publications

(28 citation statements)

References 25 publications

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“…Particle trajectories, accounting for the hydrodynamics and surface interactions at pore scale can also be numerically computed [50][51][52][53][54]. Several papers [50][51][52] reported critical velocities similar to the ones presented above.…”

Section: Towards a Pore Scale Approachmentioning

confidence: 93%

Colloidal surface interactions and membrane fouling: Investigations at pore scale

Bacchin

Marty

Duru

et al. 2011

Advances in Colloid and Interface Science

112

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Section: Towards a Pore Scale Approachmentioning

confidence: 93%

Colloidal surface interactions and membrane fouling: Investigations at pore scale

Bacchin

Marty

Duru

et al. 2011

Advances in Colloid and Interface Science

112

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“…Studies in filtration suggest that the ratio of particle to pore size must be no less than approximately 1:5 if the formation of an external filter cake due to size exclusion is to be minimized. 17 The third proposed mechanism of bacteria retention is bridging. In the bridging process, bacteria deposit at pore throats and act as collectors for subsequent deposition.…”

Section: Introductionmentioning

confidence: 99%

Transport of bacteria in porous media: I. An experimental investigation

Sarkar

Georgiou

Sharma

1994

Biotech & Bioengineering

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The convective transport of concentrated suspension of bacteria in porous media is of interest for several processes such as microbial enhanced oil recovery and in situ bioremediation. The parameters which affect the transport of the bacterium Bacillus licheniformis JF-2, a candidate microorganism for microbial enhanced oil recovery, were investigated experimentally in sandpacks. Bacteria retention and permeability reduction occurred primarily in the first few centimeters upon entering the porous medium. In downstream sections of the sandpack, the permeability reduction was low, even in cases in which high cell concentrations (10(8) cfu/mL) were detected in the effluent. The effect of (i) addition of a dispersant, (ii) linear velocity of injection, (iii) cell concentration, (iv) salinity (v) temperature, and (vi) the presence of a residual oleic phase were determined experimentally. A lower reduction in permeability and a higher effluent bacterial concentration were obtained in the presence of dispersant, high injection velocities, low salinities, and at a higher temperature. Macroscopic measurements at different linear velocities and in the presence or absence of dispersants suggest that the formation of reversible microaggregates and multiparticle hydrodynamic exclusion may be the primary mechanisms for bacterial retention and permeability reduction. (c) 1994 John Wiley & Sons, Inc.

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“…Surface chemistry [3], roughness [4], geometric constriction/expansion [5], temperature gradients, precipitation and growth mechanisms [6], reaction kinetics [7], particle momentum [8], gravitational forces, and fluid inertia [5b, 8] can each influence the clogging of microreactors when insoluble materials form [2c]. Commercially available tubing is no exception.…”

Section: Introductionmentioning

confidence: 99%

When Solids Stop Flow Chemistry in Commercial Tubing

Chen¹,

Sabio²,

Hartman³

2015

J Flow Chem

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Flow chemistry has emerged as the enabling field of high-throughput, data-driven discovery, and process chemistry, yet solids handling remains its key challenge. Insoluble salt by-products can stop flow, fluctuate reagent concentrations in reactors, and cost unexpected time and materials consumptions. The clogging of perfluoroalkoxy (PFA) tubing, stainless steel (SS) tubing, and a silicon microreactor by NaCl during a Pd-catalyzed amination using XPhos ligand was each studied. Our goal of understanding the appropriate reactor design provides in-depth analyses of constriction and mechanical entrapment. Calculations of Stokes number (St)>1 revealed that NaCl particle depositions were independent of the reactor materials. Analyses of the clogging time's dependence on the residence time (τ) and particle volume fraction (ϕ) discovered commercial tubing to be inadequate for the decoupling of the kinetics. The results prescribe why fabricated microreactors with on-chip analytics, particle formations and dissolutions, and without fluidic connections are solutions to discover and develop ubiquitous reactions that form inorganic salt by-products.

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A Stokesian dynamics model for particle deposition and bridging in granular media

Cited by 45 publications

References 25 publications

Colloidal surface interactions and membrane fouling: Investigations at pore scale

Colloidal surface interactions and membrane fouling: Investigations at pore scale

Transport of bacteria in porous media: I. An experimental investigation

When Solids Stop Flow Chemistry in Commercial Tubing

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