% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@INPROCEEDINGS{Park:867761,
      author       = {Park, Gunwoo and Brito, Mariano and Naegele, Gerhard},
      title        = {{T}he effect of dispersion transport properties on the
                      concentration-polarization layer in crossflow
                      ultrafiltration},
      reportid     = {FZJ-2019-06376},
      year         = {2019},
      abstract     = {Crossflow filtration is a pressure-driven separation and
                      enrichment process for colloidal dispersions where the feed
                      dispersion is continuously pumped through a membrane pipe.
                      The transmembrane pressure (TMP) causes solvent to flow out
                      of the membrane, while the colloidal particles are retained
                      inside the pipe. Consequently, a particles-enriched diffuse
                      layer is formed near the membrane wall which reduces the
                      filtration efficiency. This so-called
                      concentration-polarization (CP) layer is due to the balance
                      of flow advection of particles towards and gradient
                      diffusion away from the membrane. In the ultrafiltration
                      regime where Brownian motion dominates flow convection, the
                      collective diffusion coefficient and the dispersion
                      viscosity are the key transport properties determining the
                      CP layer in conjunction with the TMP and transmembrane
                      osmotic pressure. In this study, we present a finite-element
                      (FEM) method for calculating the CP layer and suspension
                      flow profiles in a crossflow ultrafiltration setup [1]. We
                      show that the FEM-calculated CP layer profiles are in
                      quantitative agreement with results obtained from a
                      simplifying boundary layer analysis [1]. Results for the
                      filtration and flow profiles are discussed for different
                      globular dispersion particles including colloidal hard
                      spheres (as a reference system), solvent-permeable particles
                      such as non-ionic microgels [2], impermeable
                      charge-stabilized particles [3], and ionic microgels with
                      concentration-dependent size [4]. We pay particular
                      attention to the effect of the different transport
                      properties and osmotic pressure dependencies on the
                      ultrafiltration profiles.References[1] G. W. Park and G.
                      Nägele, “Analytic and numerical approaches to
                      concentration-polarization layers in cross-flow
                      ultrafiltration with a cylindrical membrane pipe” (in
                      preparation)[2] R. Roa et al., “Ultrafiltration modeling
                      of non-ionic microgels,” Soft Matter 11, 4106-4122 (2015)
                      [3] R. Roa et al., “Ultrafiltration of charge-stabilized
                      dispersions at low salinity,” Soft Matter 12,4638-4653
                      (2016)[4] M. Brito et al., “Deswelling effects on
                      structural and transport properties of ionic
                      microgelsuspensions” (in preparation)},
      month         = {Jun},
      date          = {2019-06-03},
      organization  = {International Soft Matter Conference,
                       Edinburgh (UK), 3 Jun 2019 - 7 Jun
                       2019},
      subtyp        = {After Call},
      cin          = {ICS-3},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551) /
                      SFB 985 B06 - Kontinuierliche Trennung und Aufkonzentrierung
                      von Mikrogelen (B06) (221475706)},
      pid          = {G:(DE-HGF)POF3-551 / G:(GEPRIS)221475706},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/867761},
}