Dependency of active pressure and equation of state on stiffness of wall

Abstract Autonomous motion and motility are hallmarks of active matter. Active agents, such as biological cells and synthetic colloidal particles, consume internal energy or extract energy from the environment to generate self-propulsion and locomotion. These systems are persistently out of equilibr...

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Autores principales:	Emad Pirhadi, Xiang Cheng, Xin Yong
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6e0d6f166c9c4d0fb625f67cb7b21043
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spelling	oai:doaj.org-article:6e0d6f166c9c4d0fb625f67cb7b210432021-11-14T12:22:53ZDependency of active pressure and equation of state on stiffness of wall10.1038/s41598-021-01605-82045-2322https://doaj.org/article/6e0d6f166c9c4d0fb625f67cb7b210432021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01605-8https://doaj.org/toc/2045-2322Abstract Autonomous motion and motility are hallmarks of active matter. Active agents, such as biological cells and synthetic colloidal particles, consume internal energy or extract energy from the environment to generate self-propulsion and locomotion. These systems are persistently out of equilibrium due to continuous energy consumption. It is known that pressure is not always a state function for generic active matter. Torque interaction between active constituents and confinement renders the pressure of the system a boundary-dependent property. The mechanical pressure of anisotropic active particles depends on their microscopic interactions with a solid wall. Using self-propelled dumbbells confined by solid walls as a model system, we perform numerical simulations to explore how variations in the wall stiffness influence the mechanical pressure of dry active matter. In contrast to previous findings, we find that mechanical pressure can be independent of the interaction of anisotropic active particles with walls, even in the presence of intrinsic torque interaction. Particularly, the dependency of pressure on the wall stiffness vanishes when the stiffness is above a critical level. In such a limit, the dynamics of dumbbells near the walls are randomized due to the large torque experienced by the dumbbells, leading to the recovery of pressure as a state variable of density.Emad PirhadiXiang ChengXin YongNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Emad Pirhadi Xiang Cheng Xin Yong Dependency of active pressure and equation of state on stiffness of wall
description	Abstract Autonomous motion and motility are hallmarks of active matter. Active agents, such as biological cells and synthetic colloidal particles, consume internal energy or extract energy from the environment to generate self-propulsion and locomotion. These systems are persistently out of equilibrium due to continuous energy consumption. It is known that pressure is not always a state function for generic active matter. Torque interaction between active constituents and confinement renders the pressure of the system a boundary-dependent property. The mechanical pressure of anisotropic active particles depends on their microscopic interactions with a solid wall. Using self-propelled dumbbells confined by solid walls as a model system, we perform numerical simulations to explore how variations in the wall stiffness influence the mechanical pressure of dry active matter. In contrast to previous findings, we find that mechanical pressure can be independent of the interaction of anisotropic active particles with walls, even in the presence of intrinsic torque interaction. Particularly, the dependency of pressure on the wall stiffness vanishes when the stiffness is above a critical level. In such a limit, the dynamics of dumbbells near the walls are randomized due to the large torque experienced by the dumbbells, leading to the recovery of pressure as a state variable of density.
format	article
author	Emad Pirhadi Xiang Cheng Xin Yong
author_facet	Emad Pirhadi Xiang Cheng Xin Yong
author_sort	Emad Pirhadi
title	Dependency of active pressure and equation of state on stiffness of wall
title_short	Dependency of active pressure and equation of state on stiffness of wall
title_full	Dependency of active pressure and equation of state on stiffness of wall
title_fullStr	Dependency of active pressure and equation of state on stiffness of wall
title_full_unstemmed	Dependency of active pressure and equation of state on stiffness of wall
title_sort	dependency of active pressure and equation of state on stiffness of wall
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6e0d6f166c9c4d0fb625f67cb7b21043
work_keys_str_mv	AT emadpirhadi dependencyofactivepressureandequationofstateonstiffnessofwall AT xiangcheng dependencyofactivepressureandequationofstateonstiffnessofwall AT xinyong dependencyofactivepressureandequationofstateonstiffnessofwall
_version_	1718429231962128384

Dependency of active pressure and equation of state on stiffness of wall

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