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Article Dans Une Revue Physical Review E Année : 2018

Tumbling dynamics of inertial inextensible chains in extensional flow

Giorgio Krstulovic
J Bec

Résumé

The dynamics of elongated inertial particles in an extensional flow is studied numerically by performing simulations of freely jointed bead-rod chains. The coil-stretch transition and the tumbling instability are characterized as a function of three parameters: The Peclet number, the Stokes number and the chain length. Numerical results show that in the limit of infinite chain length, particles are trapped in a coiled or stretched state. The coil-stretch transition is also shown to depend non-linearly on the Stokes and Peclet number. Results also reveal that tumbling occurs close to the coil-stretch transition and that the persistence time is a non-linear function of Stokes and Peclet numbers.
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hal-02362945 , version 1 (06-05-2022)

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Christophe Henry, Giorgio Krstulovic, J Bec. Tumbling dynamics of inertial inextensible chains in extensional flow. Physical Review E , 2018, 98 (2), ⟨10.1103/PhysRevE.98.023107⟩. ⟨hal-02362945⟩
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