Dresden 2006 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 7: SYMPOSIUM Disperse Polymer Systems I
CPP 7.6: Talk
Tuesday, March 28, 2006, 11:30–11:45, ZEU 160
2-Fluid Description of Disperse Polymer Systems — •Harald Pleiner1 and James L. Harden2 — 1Max Planck Institute for Polymer Research, Mainz — 2Johns Hopkins University, Baltimore
We combine the recently developed nonlinear hydrodynamic description of viscoelastic fluids [1] with a general 2-fluid hydrodynamics of 2-component and 2-momentum systems [2] to give a generalized-hydrodynamics model for disperse polymers. The former covers the usual non-Newtonian effects, like shear thinning, strain hardening, stress overshoot, normal stress differences and non-exponential stress relaxation, while the latter deals with the relative velocity and its relaxation, the stress division between the two subsystems, the convective velocity problem and the anomalous concentration dynamics.
[1] H. Pleiner, M. Liu and H.R. Brand, Rheologica Acta, 39, 560 (2000) and 43, 502 (2004). [2] H. Pleiner and J.L. Harden, in Nonlinear Problems of Continuum Mechanics, Special issue of Notices of Universities. South of Russia. Natural sciences, p.46 (2003) and cond-mat/0404134.