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| Hauptseite > Publikationsdatenbank > Mesoscale hydrodynamic modeling of a colloid in shear-thinning viscoelastic fluids under shear flow > print |
| Hauptseite > Publikationsdatenbank > Mesoscale hydrodynamic modeling of a colloid in shear-thinning viscoelastic fluids under shear flow > print |
| 001 | 16775 | ||
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| 024 | 7 | _ | |2 DOI |a 10.1063/1.3646307 |
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| 084 | _ | _ | |2 WoS |a Physics, Atomic, Molecular & Chemical |
| 100 | 1 | _ | |0 P:(DE-Juel1)VDB94057 |a Ji, S. |b 0 |u FZJ |
| 245 | _ | _ | |a Mesoscale hydrodynamic modeling of a colloid in shear-thinning viscoelastic fluids under shear flow |
| 260 | _ | _ | |a Melville, NY |b American Institute of Physics |c 2011 |
| 300 | _ | _ | |a 134116 |
| 336 | 7 | _ | |a Journal Article |0 PUB:(DE-HGF)16 |2 PUB:(DE-HGF) |
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| 440 | _ | 0 | |0 3145 |a Journal of Chemical Physics |v 135 |x 0021-9606 |y 13 |
| 500 | _ | _ | |a We thank Jan Vermant (Leuven), Ingo O. Gotze, and Chien-Cheng Huang (Julich) for stimulating discussions. Financial support by the EU FP7 Collaborative Research Project "Nanodirect" (NMP4-SL-2008-213948) is gratefully acknowledged. |
| 520 | _ | _ | |a In order to study the dynamics of colloidal suspensions with viscoelastic solvents, a simple mesoscopic model of the solvent is required. We propose to extend the multiparticle collision dynamics (MPC) technique--a particle-based simulation method, which has been successfully applied to study the hydrodynamic behavior of many complex fluids with Newtonian solvent--to shear-thinning viscoelastic solvents. Here, the normal MPC particles are replaced by dumbbells with finite-extensible nonlinear elastic (FENE) springs. We have studied the properties of FENE-dumbbell fluids under simple shear flow with shear rate ̇γ. The stress tensor is calculated, and the viscosity η and the first normal-stress coefficient Ψ(1) are obtained. Shear-thinning behavior is found for reduced shear rates Γ= ̇γτ>1, where τ is a characteristic dumbbell relaxation time. Here, both η and Ψ(1) display power-law behavior in the shear-thinning regime. Thus, the FENE-dumbbell fluid with MPC collisions provides a good description of viscoelastic fluids. As a first application, we study the flow behavior of a colloid in a shear-thinning viscoelastic fluid in two dimensions. A slowing down of the colloid rotation in a viscoelastic fluid compared to a Newtonian fluid is obtained, in agreement with recent numerical calculations and experimental results. |
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| 773 | _ | _ | |0 PERI:(DE-600)1473050-9 |a 10.1063/1.3646307 |g Vol. 135, p. 134116 |p 134116 |q 135<134116 |t The @journal of chemical physics |v 135 |x 0021-9606 |y 2011 |
| 856 | 7 | _ | |u http://dx.doi.org/10.1063/1.3646307 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/16775/files/FZJ-16775.pdf |y Published under German "Allianz" Licensing conditions on 2011-10-06. Available in OpenAccess from 2011-10-06 |z Published final document. |
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