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| Hauptseite > Publikationsdatenbank > Hydrodynamic correlations of viscoelastic fluids by multiparticle collision dynamics simulations > print |
| Hauptseite > Publikationsdatenbank > Hydrodynamic correlations of viscoelastic fluids by multiparticle collision dynamics simulations > print |
| 001 | 866677 | ||
| 005 | 20210130003600.0 | ||
| 024 | 7 | _ | |a 10.1063/1.5126082 |2 doi |
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| 024 | 7 | _ | |a 1089-7690 |2 ISSN |
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| 100 | 1 | _ | |a Toneian, David |0 0000-0002-6456-9234 |b 0 |
| 245 | _ | _ | |a Hydrodynamic correlations of viscoelastic fluids by multiparticle collision dynamics simulations |
| 260 | _ | _ | |a Melville, NY |c 2019 |b American Institute of Physics |
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| 520 | _ | _ | |a The emergent fluctuating hydrodynamics of a viscoelastic fluid modeled by the multiparticle collision dynamics (MPC) approach is studied. The fluid is composed of flexible, Gaussian phantom polymers that interact by local momentum-conserving stochastic MPCs. For comparison, the analytical solution of the linearized Navier-Stokes equation is calculated, where viscoelasticity is taken into account by a time-dependent shear relaxation modulus. The fluid properties are characterized by the transverse velocity autocorrelation function in Fourier space as well as in real space. Various polymer lengths are considered—from dumbbells to (near-)continuous polymers. Viscoelasticity affects the fluid properties and leads to strong correlations, which overall decay exponentially in Fourier space. In real space, the center-of-mass velocity autocorrelation function of individual polymers exhibits a long-time tail, independent of the polymer length, which decays as t−3/2, similar to a Newtonian fluid, in the asymptotic limit t → ∞. Moreover, for long polymers, an additional power-law decay appears at time scales shorter than the longest polymer relaxation time with the same time dependence, but negative correlations, and the polymer length dependence L−1/2. Good agreement is found between the analytical and simulation results |
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| 700 | 1 | _ | |a Kahl, Gerhard |0 0000-0002-4375-4684 |b 1 |
| 700 | 1 | _ | |a Gompper, Gerhard |0 P:(DE-Juel1)130665 |b 2 |e Corresponding author |
| 700 | 1 | _ | |a Winkler, Roland G. |0 P:(DE-Juel1)131039 |b 3 |e Corresponding author |
| 773 | _ | _ | |a 10.1063/1.5126082 |g Vol. 151, no. 19, p. 194110 - |0 PERI:(DE-600)1473050-9 |n 19 |p 194110 |t The journal of chemical physics |v 151 |y 2019 |x 1089-7690 |
| 856 | 4 | _ | |y Published on 2019-11-20. Available in OpenAccess from 2020-11-20. |u https://juser.fz-juelich.de/record/866677/files/1.5126082.pdf |
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