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BP: Fachverband Biologische Physik

BP 5: Tissue Dynamics \& Developmental Processes

BP 5.5: Talk

Monday, March 14, 2011, 15:15–15:30, ZEU 250

Pattern formation in active fluids — •Justin Bois^1,2, Frank Jülicher¹, and Stephan Grill^1,2 — ¹Max Planck Institute for the Physics of Complex Systems, Dresden, Germany — ²Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany

We discuss pattern formation in active fluids in which active stress is regulated by diffusing molecular components. Nonhomogeneous active stress profiles create patterns of flow which transport stress regulators by advection. Our work is motivated by the dynamics of the actomyosin cell cortex in which biochemical pathways regulate active stress. We present a mechanism in which a single diffusing species up-regulates active stress, resulting in steady flow and concentration patterns. We also discuss general pattern-formation behaviors of reaction diffusion systems placed in active fluids.