Dresden 2020 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 24: Complex Fluids and Soft Matter (joint session DY/CPP)
DY 24.12: Talk
Tuesday, March 17, 2020, 12:30–12:45, ZEU 160
Formation of networks from attractive particles under shear — •Sebastian Bindgen1, Dieter Diels1, Pierre de Buyl2, Joost de Graaf3, and Erin Koos1 — 1Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200f - box 2424, 3001 Leuven, Belgium — 2Institute for Theoretical Physics, KU Leuven, Celestijnenlaan 200d - box 2415, 3001 Leuven, Belgium — 3Institute for Theoretical Physics, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
Simulations give access to physical quantities at the particle-level, which are not readily accessible via experimental techniques. Lees-Edwards boundary conditions replicate in-vitro conditions and have seen significant use in the polymer community. We have implemented and tested a version of this algorithm in the MD simulation package ESPResSo. The implementation, which is based on pair-wise thermostating using the dissipative particle dynamics technique, can also mimic non-linear effects such as shear banding. We demonstrate that our implementation captures the enhanced diffusion of particles coupled to the fluid. Furthermore, we use our implementation to study the dynamic properties of depletion gels including their formation and breakup under shear flow. Recent investigations have shown that hydrodynamics affects the time scales on which these gels form under quiescence, while leaving the final structure unaltered. We aim to show these processes under dynamic conditions. Our study is of clear interest for industrial systems such as ink or pastes as they can experience various complex flow fields during processing and application.