Mechanical pressure and momentum conservation in dry active matter

  title={Mechanical pressure and momentum conservation in dry active matter},
  author={Yaouen Fily and Yariv Kafri and Alexandre Solon and Julien Tailleur and Ari M. Turner},
We relate the breakdown of equations of states (EOS) for the mechanical pressure of generic dry active systems to the lack of momentum conservation in such systems. We show how net sources and sinks of momentum arise generically close to confining walls. These typically depend on the interactions of the container with the particles, which makes the mechanical pressure a container-dependent quantity. We show that an EOS is recovered if the dynamics of the propulsive forces of the particles are… CONTINUE READING
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