Pressure driven transport of neutral macro-solute in microchannel with porous wall at high surface potential

Mondal, Sourav; De, Sirshendu

doi:10.1016/j.ijheatmasstransfer.2016.08.092

Cited by 7 publications

(2 citation statements)

References 47 publications

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“…In addition, in separation science and technology, flow through functionalized nanofiltration membranes can be modeled using the theory for solute transport through nanochannel. Transport phenomena in these systems have been theoretically studied for the case of microchannel/microtube at constant permeate flux , flow of neutral solutes , flow of solution containing asymmetric electrolyte , Newtonian and non‐newtonian fluid flow , generation of streaming potential and electroviscous effect , etc.…”

Section: Introductionmentioning

confidence: 99%

Mass transfer of a neutral solute in polyelectrolyte grafted soft nanochannel with porous wall

Roy

Bhattacharjee

2019

Electrophoresis

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A soft nanochannel involves a soft interface that contains a polyelectrolyte layer (PEL) sandwiched between a rigid surface and a bulk electrolyte solution. Mass transfer of a neutral solute in a combined electroosmotic and pressure driven flow through a polyelectrolyte grafted charged nanochannel with porous wall is presented in this work. Assuming the PEL as fixed charged layer and PEL-electrolyte interface as a semi-penetrable membrane, analytical solutions were obtained for potential distributions (for small wall potential). Velocity profiles were also derived in the same domains, for both inside and outside the PEL. Convective-diffusive species balance equation was semi-analytically solved inside the PEL. Expression of length averaged Sherwood number was also obtained and effects of different parameters, namely, drag parameter (α), Debye parameter (κ ), and PEL thickness were studied in detail. The variation of permeate concentration and permeation flux across the porous wall was obtained.

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Section: Introductionmentioning

confidence: 99%

Mass transfer of a neutral solute in polyelectrolyte grafted soft nanochannel with porous wall

Roy

Bhattacharjee

2019

Electrophoresis

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“…Despite being a field of such importance, little literature is available on mass transport of a macrosolute through porous wall of micro/nano channel under electroosmotic flow and overlapping EDL using non‐Newtonian rheology. Most of the studies are available either with Newtonian flow or non‐overlapping EDL . The present study is undertaken to fill this gap.…”

Section: Introductionmentioning

confidence: 99%

Effects of overlapping electric double layer on mass transport of a macro‐solute across porous wall of a micro/nanochannel for power law fluid

Bhattacharjee

Mondal

2017

Electrophoresis

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Effects of overlapping electric double layer and high wall potential on transport of a macrosolute for flow of a power law fluid through a microchannel with porous walls are studied in this work. The electric potential distribution is obtained by coupling the Poisson's equation without considering the Debye-Huckel approximation. The numerical solution shows that the center line potential can be 16% of wall potential at pH 8.5, at wall potential -73 mV and scaled Debye length 0.5. Transport phenomena involving mass transport of a neutral macrosolute is formulated by species advective equation. An analytical solution of Sherwood number is obtained for power law fluid. Effects of fluid rheology are studied in detail. Average Sherwood number is more for a pseudoplastic fluid compared to dilatant upto the ratio of Poiseuille to electroosmotic velocity of 5. Beyond that, the Sherwood number is independent of fluid rheology. Effects of fluid rheology and solute size on permeation flux and concentration of neutral solute are also quantified. More solute permeation occurs as the fluid changes from pseudoplastic to dilatant.

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Effect of AC electric field in mass transport of a neutral solute in a microtube with porous wall

Kumar,

2024

Chemical Engineering Science

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Pressure driven transport of neutral macro-solute in microchannel with porous wall at high surface potential

Cited by 7 publications

References 47 publications

Mass transfer of a neutral solute in polyelectrolyte grafted soft nanochannel with porous wall

Mass transfer of a neutral solute in polyelectrolyte grafted soft nanochannel with porous wall

Effects of overlapping electric double layer on mass transport of a macro‐solute across porous wall of a micro/nanochannel for power law fluid

Effect of AC electric field in mass transport of a neutral solute in a microtube with porous wall

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