Mechanical pressure and work cycle of confined active Brownian particles / Paolo Malgaretti; Piotr Nowakowski; Holger Stark
Si trova su / Altri legami
© 2021 EPLAWe derive an analytic expression for the mechanical pressure of a generic one–dimensional model of confined active Brownian particles (ABPs) that is valid for all values of Péclet number Pe and all confining scenarios. Our model reproduces the known scaling of bulk pressure with Pe2 while in strong confinement pressure scales with Pe. Our analytic results are very well reproduced by simulations of ABPs in 2D. We use the pressure formula to calculate both the work performed by an active engine and its efficiency. In particular, efficiency is maximized for work cycles with finite period and not in the limit of infinitely slow cycles as in thermodynamic engines.
