This title appears in the Scientific Report :
2010
Please use the identifier:
http://hdl.handle.net/2128/3786 in citations.
Please use the identifier: http://dx.doi.org/10.1088/0953-8984/22/32/322101 in citations.
High-frequency viscosity and generalized Stokes-Einstein relations in dense suspensions of porous particles
High-frequency viscosity and generalized Stokes-Einstein relations in dense suspensions of porous particles
We study the high-frequency limiting shear viscosity, η∞, of colloidal suspensions of uncharged porous particles. An individual particle is modeled as a uniformly porous sphere with the internal solvent flow described by the Debye-Bueche-Brinkman equation. A precise hydrodynamic multipole method wit...
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Personal Name(s): | Abade, G.C. |
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Cichocki, B. / Ekiel-Jezewska, M.L. / Nägele, G. / Wajnryb, E. | |
Contributing Institute: |
Weiche Materie; IFF-7 |
Published in: | Journal of physics / Condensed matter, 22 (2010) S. 32210 |
Published in: |
IOP Select article |
Imprint: |
Bristol
IOP Publ.
2010
|
Physical Description: |
32210 |
DOI: |
10.1088/0953-8984/22/32/322101 |
PubMed ID: |
21386474 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Journal of Physics: Condensed Matter
22 |
Subject (ZB): | |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1088/0953-8984/22/32/322101 in citations.
We study the high-frequency limiting shear viscosity, η∞, of colloidal suspensions of uncharged porous particles. An individual particle is modeled as a uniformly porous sphere with the internal solvent flow described by the Debye-Bueche-Brinkman equation. A precise hydrodynamic multipole method with a full account of many-particle hydrodynamic interactions encoded in the HYDROMULTIPOLE program extended to porous particles, is used to calculate η∞ as a function of porosity and concentration. The second-order virial expansion for η∞ is derived, and its range of applicability assessed. The simulation results are used to test the validity of generalized Stokes-Einstein relations between η∞ and various short-time diffusion coefficients, and to quantify the accuracy of a simplifying cell model calculation of η∞. An easy-to-use generalized Saitô formula for η∞ is presented which provides a good description of its porosity and concentration dependence. |