Tumbling dynamics of inertial chains in extensional flow
arXiv:1802.04871 · doi:10.1103/PhysRevE.98.023107
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.
References in corpus (7)
- Statistics of tumbling of a single polymer molecule in shear flow
- Polymer Stretching by Turbulence
- Tumbling of small axisymmetric particles in random and turbulent flows
- Direct observation of DNA dynamics in semi-dilute solutions in extensional flow
- Tumbling of asymmetric microrods in a microchannel flow
- Deformation of a flexible fiber in a viscous flow past an obstacle
- Tumbling of a Brownian particle in an extensional flow