Non-spherical Bodies With Particle and Fluid Inertia: Rotating or Surfing?

Authors: Lundell, F., Rosén, T.
Document Type: Conference
Pubstate: Published
Journal: 7th International Conference on Flow Dynamics, Sendai, Japan (2012)
Year: 2012


The motion of non-spherical particles in shear flow and extensional flow is studied numerically and theoretically. The purpose of the study is to provide fundamental knowledge that is necessary in order to model flows with non-spherical particles. Here, two flow cases will be studied and presented. The first is an ellipsoid in extensional flow under the Stokes flow assumption. It is shown that particle inertia controls whether the particle align monotonously or oscillate with a decreasing amplitude. The second is an ellipsoid in shear flow. It is shown that there might be both steady and tumbling solutions at elevated Reynolds numbers.