Tumbling of Small Axisymmetric Particles in Random and Turbulent Flows
Tumbling of Small Axisymmetric Particles in Random and Turbulent Flows
We analyze the tumbling of small nonspherical, axisymmetric particles in random and turbulent flows. We compute the orientational dynamics in terms of a perturbation expansion in the Kubo number, and obtain the tumbling rate in terms of Lagrangian correlation functions. These capture preferential sampling of the fluid gradients, which in …