Overview
Syllabus
Stochastic Thermodynamics, Active Matter and Driven Systems
Topology in Biology
Active particles convert energy to motion Energy enters the system on a single particle level
Active turbulence
Active turbulence of cells?
Dense active matter and active turbulence
Liquid crystals
Continuum equations of liquid crystal hydrodynamics
Hydrodynamics of active systems
Continuum equations of active liquid crystal hydrodynamics
1. Active stress =active turbulence
Instabilities in active nematic
Active turbulence is characterized by
Active turbulence: topological defects are created and destroyed
Unidirectional Alignment of the Active Nematic
States of an Active Nematic in a Channel
Ceilidh Dance
Vortex lattice and active topological microfluidics
Transition to Turbulence
Vorticity distribution
Enstrophy kymograph
Directed percolation
Turbulent fraction as a function of activity
Confinement is a way of harnessing active energy
Cell division
2. Division acts as extensible stress
Flow field around +1/2 defect
Extrusion of dead cells - correlated to topological defects
Confinement by walls can lead to regular vortex lattices in active systems & topological microfluidics
Q&A
Taught by
International Centre for Theoretical Sciences