Tumbling dynamics of inertial chains in extensional flow
Fluid Dynamics
2018-08-29 v1
Abstract
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.
Cite
@article{arxiv.1802.04871,
title = {Tumbling dynamics of inertial chains in extensional flow},
author = {Christophe Henry and Giorgio Krstulovic and Jérémie Bec},
journal= {arXiv preprint arXiv:1802.04871},
year = {2018}
}