Berlin 2018 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 70: Poster: Flows, Patterns, Delay, Reaction Diffusion

DY 70.12: Poster

Donnerstag, 15. März 2018, 15:30–18:00, Poster A

Multiple-relaxation-time lattice Boltzmann implementation for shear thinning fluids — •Sebastian Johannes Müller and Stephan Gekle — Juniorprofessur Theoretische Physik, Universität Bayreuth

An important aspect of biofabrication processes is the shear thinning behaviour of polymer solutions used as bioinks. It becomes particularly important considering the forces acting on the flowing cells and the cell deformations during the printing procedure. As the lattice Boltzmann method is a common approach to computational fluid dynamics, we use a multiple-relaxation-time model to implement different models for non-Newtonian fluids in the simulation package ESPResSo. The simplest model, allowing comparison of the simulation results with analytical flow results, is the power-law model for the fluid viscosity. We extend our simulations with enhanced models for non-Newtonian fluids, like the Carreau-Yasuda and the Cross model, which include Newtonian behaviour in the limits of zero and infinite shear-rate.