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cond-mat.soft2026
Chapman-Enskog expansion for chirally colliding disks
Ruben Lier, Paweł Matus
We study a two-dimensional gas of hard disks undergoing chiral, energy- and momentum-conserving collisions. We propose a simple chiral collision rule and show that it can effective…
cond-mat.soft2025
On the temperature of an active nematic
Jay Armas, Akash Jain, Ruben Lier
We employ a novel hydrodynamic framework for active matter coupled to an environment to study the local temperature of an active nematic, assuming proximity to thermal equilibrium.…