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Papenkort, Simon and Voigtmann, Thomas (2014) Channel flow of a tensorial shear-thinning Maxwell model: Lattice Boltzmann simulations. Journal of Chemical Physics, 140, p. 164507. American Institute of Physics (AIP). doi: 10.1063/1.4872219. ISSN 0021-9606.
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Abstract
We discuss pressure-driven channel flow for a model of shear-thinning glass-forming fluids, employing a modified lattice-Boltzmann (LB) simulation scheme. The model is motivated by a recent microscopic approach to the nonlinear rheology of colloidal suspensions and captures a nonvanishing dynamical yield stress and the appearance of normal-stress differences and a flow-induced pressure contribution. The standard LB algorithm is extended to deal with tensorial, nonlinear constitutive equations of this class. The new LB scheme is tested in 2D pressure-driven channel flow and reproduces the analytical steady-state solution. The transient dynamics after startup and removal of the pressure gradient reproduce a finite stopping time for the cessation flow of yield-stress fluids in agreement with previous analytical estimates.
| Item URL in elib: | https://elib.dlr.de/89042/ | ||||||||||||
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| Document Type: | Article | ||||||||||||
| Title: | Channel flow of a tensorial shear-thinning Maxwell model: Lattice Boltzmann simulations | ||||||||||||
| Authors: |
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| Date: | 25 April 2014 | ||||||||||||
| Journal or Publication Title: | Journal of Chemical Physics | ||||||||||||
| Refereed publication: | Yes | ||||||||||||
| Open Access: | No | ||||||||||||
| Gold Open Access: | No | ||||||||||||
| In SCOPUS: | Yes | ||||||||||||
| In ISI Web of Science: | Yes | ||||||||||||
| Volume: | 140 | ||||||||||||
| DOI: | 10.1063/1.4872219 | ||||||||||||
| Page Range: | p. 164507 | ||||||||||||
| Publisher: | American Institute of Physics (AIP) | ||||||||||||
| ISSN: | 0021-9606 | ||||||||||||
| Status: | Published | ||||||||||||
| Keywords: | fluid dynamics, non-Newtonian rheology, lattice Boltzmann simulation, CFD | ||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
| HGF - Program: | Space | ||||||||||||
| HGF - Program Themes: | Research under Space Conditions | ||||||||||||
| DLR - Research area: | Raumfahrt | ||||||||||||
| DLR - Program: | R FR - Research under Space Conditions | ||||||||||||
| DLR - Research theme (Project): | R - Vorhaben Materialwissenschaftliche Forschung (old) | ||||||||||||
| Location: | Köln-Porz | ||||||||||||
| Institutes and Institutions: | Institute of Materials Physics in Space | ||||||||||||
| Deposited By: | Voigtmann, Dr.rer.nat. Thomas | ||||||||||||
| Deposited On: | 07 May 2014 08:36 | ||||||||||||
| Last Modified: | 08 Mar 2018 18:42 |
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