Dresden 2017 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 20: Soft Particles in Flows III (Focus session, joint DY/CPP)

DY 20.3: Talk

Tuesday, March 21, 2017, 14:45–15:00, ZEU 160

Soft colloid suspensions in external flow fields — •Roland G. Winkler and Gerhard Gompper — ICS and IAS, Forschungszentrum Jülich, 52428 Jülich, Germany

Soft colloids, like linear polymers as well as more complex polymeric structures such as star polymers or polymer networks exhibit large conformational changes and an intriguing dynamics when exposed to, e.g., a shear flow [1]. The flow field leads to polymer stretching, associated with a shape change of the soft colloids, and alignment, which depend on the specific structure of the particle. The particular structure even more determines the nonequilibrium dynamics. We will present simulation results of the nonequilibrium properties of such polymeric structures obtained by combining the multiparticle collision dynamics method, a mesoscale simulation approach for fluids [2], with molecular dynamics simulations for embedded polymeric objects. Moreover, the rheological characteristics of semidilute suspensions of linear [3] and star polymers [4] as well as end-functionalized semiflexible polymers [5] will be discussed.

[1] R.G. Winkler et al., Curr. Opin. Colloid Interface Sci. 19, 594 (2014)

[2] G. Gompper et al., Adv. Polym. Sci. 221, 1 (2009)

[3] C.-C. Huang et al., Macromolecules 43, 10107 (2010)

[4] S. P. Singh et al., J. Chem. Phys. 141, 084901 (2014)

[5] J. S. Myung et al., J. Chem. Phys. 143, 243117 (2015)