Berlin 2012 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 3: Fluid dynamics I

DY 3.3: Vortrag

Montag, 26. März 2012, 10:30–10:45, MA 144

On the dynamics of dimer and trimer suspensions — •Johannes Greber and Walter Zimmermann — Uni Bayreuth, LS Theoretische Physik I

The nonlinear hydrodynamic interaction between dumbbells and longer chains of beads coupled via harmonic spring forces in suspension causes in linear shear flow a much more complex dynamics, as obtained for a single dumbbell or chain. This result is obtained with Fluid Particle Dynamics (FPD) simulations of such suspensions. The complex flow field caused by the dynamics of dumbbells and chains as well as the mixing behavior is compared with those obtained in inertial turbulence at high Reynolds numbers. The complex dumbbell dynamics shares also similarities with so called elastic turublence, observed in experiments with polymer solutions [1].

[1] A. Groisman, V. Steinberg : New J. Phys. (2004) Elastic turbulence in curvilinear flows of polymer solutions