Articles producció científica> Enginyeria Mecànica

Shape evolution of long flexible fibers in viscous flows

  • Datos identificativos

    Identificador: imarina:9262310
    Autores:
    Norouzi, MohammadJavadAndric, JelenaVernet, AntonPallares, Jordi
    Resumen:
    The present work studies numerically the dynamics and shape evolution of long flexible fibers suspended in a Newtonian viscous cellular flow using a particle-level fiber simulation technique. The fiber is modeled as a chain of massless rigid cylindrical segments connected by ball and socket joints; one-way coupling between the fibers and the flow is considered while Brownian motion is neglected. The effect of stiffness, equilibrium shape, and aspect ratio of the fibers on the shape evolution of the fibers are analyzed. Moreover, the influence of fiber stiffness and their initial positions and orientations on fiber transport is investigated. For the conditions considered, the results show that the fiber curvature field resembles that of the flow streamline. It is found that the stiffer fibers experience not only a quicker relaxation phase, in which they transient from their initial shape to their "steady-state shape," but they also regain their equilibrium shape to a larger extent. The findings also demonstrate that even a small deviation of fiber shape from perfectly straight impacts significantly the early-stage evolution of the fiber shape and their bending behavior. Increasing the fiber aspect ratio, when other parameters are kept fixed, leads the fiber to behave more flexible, and it consequently deforms to a larger extent to adjust to the shape of the flow streamlines. In agreement with the available experimental results, the fiber transport studies show that either the fiber becomes trapped within the vortices of the cellular array or it moves across the vortical arrays while exhibiting various complex shapes.
  • Otros:

    Autor según el artículo: Norouzi, MohammadJavad; Andric, Jelena; Vernet, Anton; Pallares, Jordi;
    Departamento: Enginyeria Mecànica
    Autor/es de la URV: Norouzi, Mohammadjavad / Pallarés Curto, Jorge María / Vernet Peña, Antonio
    Palabras clave: Transport Suspensions Shear Particles Orientation Motion Microtubules Elastic fibers Dynamics
    Resumen: The present work studies numerically the dynamics and shape evolution of long flexible fibers suspended in a Newtonian viscous cellular flow using a particle-level fiber simulation technique. The fiber is modeled as a chain of massless rigid cylindrical segments connected by ball and socket joints; one-way coupling between the fibers and the flow is considered while Brownian motion is neglected. The effect of stiffness, equilibrium shape, and aspect ratio of the fibers on the shape evolution of the fibers are analyzed. Moreover, the influence of fiber stiffness and their initial positions and orientations on fiber transport is investigated. For the conditions considered, the results show that the fiber curvature field resembles that of the flow streamline. It is found that the stiffer fibers experience not only a quicker relaxation phase, in which they transient from their initial shape to their "steady-state shape," but they also regain their equilibrium shape to a larger extent. The findings also demonstrate that even a small deviation of fiber shape from perfectly straight impacts significantly the early-stage evolution of the fiber shape and their bending behavior. Increasing the fiber aspect ratio, when other parameters are kept fixed, leads the fiber to behave more flexible, and it consequently deforms to a larger extent to adjust to the shape of the flow streamlines. In agreement with the available experimental results, the fiber transport studies show that either the fiber becomes trapped within the vortices of the cellular array or it moves across the vortical arrays while exhibiting various complex shapes.
    Áreas temáticas: Mechanics Mechanical engineering Matemática / probabilidade e estatística Interdisciplinar Engenharias iii Engenharias i Computational mechanics Ciência da computação Astronomia / física
    Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/
    Direcció de correo del autor: mohammadjavad.norouzi@estudiants.urv.cat mohammadjavad.norouzi@estudiants.urv.cat anton.vernet@urv.cat jordi.pallares@urv.cat
    Identificador del autor: 0000-0002-7719-577X 0000-0002-7719-577X 0000-0002-7028-1368 0000-0003-0305-2714
    Fecha de alta del registro: 2024-09-07
    Versión del articulo depositado: info:eu-repo/semantics/publishedVersion
    Enlace a la fuente original: https://link.springer.com/article/10.1007/s00707-022-03205-7
    URL Documento de licencia: https://repositori.urv.cat/ca/proteccio-de-dades/
    Referencia al articulo segun fuente origial: Acta Mechanica. 233 (5): 2077-2091
    Referencia de l'ítem segons les normes APA: Norouzi, MohammadJavad; Andric, Jelena; Vernet, Anton; Pallares, Jordi; (2022). Shape evolution of long flexible fibers in viscous flows. Acta Mechanica, 233(5), 2077-2091. DOI: 10.1007/s00707-022-03205-7
    DOI del artículo: 10.1007/s00707-022-03205-7
    Entidad: Universitat Rovira i Virgili
    Año de publicación de la revista: 2022
    Tipo de publicación: Journal Publications
  • Palabras clave:

    Computational Mechanics,Mechanical Engineering,Mechanics
    Transport
    Suspensions
    Shear
    Particles
    Orientation
    Motion
    Microtubules
    Elastic fibers
    Dynamics
    Mechanics
    Mechanical engineering
    Matemática / probabilidade e estatística
    Interdisciplinar
    Engenharias iii
    Engenharias i
    Computational mechanics
    Ciência da computação
    Astronomia / física
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