Rotation Rate of Rods in Turbulent Fluid Flow
arXiv:1205.0219 · doi:10.1103/PhysRevLett.109.134501
Abstract
The rotational dynamics of anisotropic particles advected in a turbulent fluid flow are important in many industrial and natural setting. Particle rotations are controlled by small scale properties of turbulence that are nearly universal, and so provide a rich system where experiments can be directly compared with theory and simulations. Here we report the first three-dimensional experimental measurements of the orientation dynamics of rod-like particles as they are advected in a turbulent fluid flow. We also present numerical simulations that show good agreement with the experiments and allow extension to a wide range of particle shapes. Anisotropic tracer particles preferentially sample the flow since their orientations become correlated with the velocity gradient tensor. The rotation rate is heavily influenced by this preferential alignment, and the alignment depends strongly on particle shape.
Cited by in corpus (12)
- Shape-dependence of particle rotation in isotropic turbulence
- Measurements of the coupling between the tumbling of rods and the velocity gradient tensor in turbulence
- Measurements of the Solid-body Rotation of Anisotropic Particles in 3D Turbulence
- Regularized Inverse Holographic Volume Reconstruction for 3D Particle Tracking
- Deformation statistics of sub-Kolmogorov-scale ellipsoidal neutrally buoyant drops in isotropic turbulence
- Internal stresses and breakup of rigid isostatic aggregates in homogeneous and isotropic turbulence
- Angular dynamics of a small particle in turbulence
- Angular dynamics of small crystals in viscous flow
- Emergence of chaos in a viscous solution of rods
- Emergent scar lines in chaotic advection of passive directors
- Bead-rod-spring models in random flows
- Lagrangian time scale of rotation for inertial fibers in isotropic turbulence