Bias- and bath-mediated pairing of particles driven through a quiescent medium

Carlos, Mejia-Monasterio y Gleb, Oshanin (2011). Bias- and bath-mediated pairing of particles driven through a quiescent medium. "Soft Matter", v. 7 ; pp. 993-1000. https://doi.org/10.1039/c0sm00465k.

Descripción

Título: Bias- and bath-mediated pairing of particles driven through a quiescent medium
Autor/es:
  • Carlos, Mejia-Monasterio
  • Gleb, Oshanin
Tipo de Documento: Artículo
Título de Revista/Publicación: Soft Matter
Fecha: 2011
Volumen: 7
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Ingeniería Rural [hasta 2014]
Licencias Creative Commons: Reconocimiento - No comercial

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Resumen

A particle driven by an external force in a molecular crowding environment—a quiescent bath of other particles, makes their spatial distribution inhomogeneous: the bath particles accumulate in front of the biased particle (BP) and are depleted behind. In fact, a BP travels together with the inhomogeneity it creates. A natural question is what will happen with two BPs when they appear sufficiently close to each other such that the inhomogeneities around each of them start to interfere? In quest for the answer we examine here, via Monte Carlo simulations, the dynamics of two BPs in a lattice gas of bath particles. We observe that for a sufficiently dense medium, surprisingly, both BPs spend most of the time together which signifies that the interference of the microstructural inhomogeneities results in effectively attractive interactions between them. Such statistical pairing of BPs minimizes the size of the inhomogeneity and hence reduces the frictional drag force exerted on the BPs by the medium. As a result, in some configurations the center-of-mass of a pair of BPs propagates faster than a single isolated BP. These jamming-induced forces are very different from fundamental physical interactions, exist only in presence of an external force, and require the presence of a quiescent bath to mediate the interactions between the driven particles.

Más información

ID de Registro: 9829
Identificador DC: http://oa.upm.es/9829/
Identificador OAI: oai:oa.upm.es:9829
Identificador DOI: 10.1039/c0sm00465k
URL Oficial: http://pubs.rsc.org/en/content/articlelanding/2011/sm/c0sm00465k
Depositado por: Dr. Carlos Mejia-Monasterio
Depositado el: 13 Dic 2011 12:45
Ultima Modificación: 20 Abr 2016 18:07
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