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@INPROCEEDINGS{Roa:187765,
      author       = {Roa, Rafael and Zholkovskiy, Emiliy K. and Naegele,
                      Gerhard},
      title        = {{U}ltrafiltration of permeable hard-sphere suspensions},
      reportid     = {FZJ-2015-01347},
      year         = {2014},
      abstract     = {Membrane ultrafiltration is a pressure driven process
                      useful for the separation of brownian par- ticles, like
                      small colloids or nanoparticles, from a solvent or smaller
                      solutes. This process is of high importance for the
                      concentration of protein or small microgel suspensions. In
                      these systems, concentration polarization determines the
                      permeate flux (Figure 1). Concentration polarization is the
                      build-up of solute at the membrane surface due to
                      convective-diffusive trans- port of solute in the boundary
                      layer. The efficiency of the separation process is thus
                      strongly dependent on the hydrodynamic conditions, membrane
                      porosity and colloidal interactions.We present a macroscopic
                      model for cross-flow ultrafiltration, where the suspension
                      is flowing tangentially over the membrane surface. We study
                      filtration of suspensions of neutral permeable particles
                      [1]. The influence of the nature of the particles is
                      reflected through the transport prop- erties of the
                      suspension, such as the concentration-dependent collective
                      diffusion coefficient and the effective suspension viscosity
                      [2,3]. We analyze the efficiency of the filtration process
                      by studying the concentration polarization layer and the
                      permeate flux at different operating conditions (applied
                      transmembrane pressure and shear rate).References[1] R. Roa,
                      E. K. Zholkovskiy and G. Nägele, to be submitted.[2] G. C.
                      Abade, B. Cichocki, M. L. Ekiel-Jez ̇ewska, G. Nägele and
                      E. Wajnryb, J. Chem.Phys. 136, 104902, (2012).[3] E. K.
                      Zholkovskiy, V. N. Shilov, J. H. Masliyah, and M. P.
                      Bondarenko, Can. J. Chem. Eng. 85, 701, (2007).},
      month         = {Nov},
      date          = {2014-11-11},
      organization  = {Jülich Soft Matter Days 2014, Bad
                       Honnef (Germany), 11 Nov 2014 - 14 Nov
                       2014},
      subtyp        = {After Call},
      cin          = {ICS-3},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {451 - Soft Matter Composites (POF2-451)},
      pid          = {G:(DE-HGF)POF2-451},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/187765},
}