Tracking the dynamics of translation and absolute orientation of a sphere in a turbulent flow

Abstract

We study the 6-dimensional dynamics -- position and orientation -- of a large sphere advected by a turbulent flow. The movement of the sphere is recorded with 2 high-speed cameras. Its orientation is tracked using a novel, efficient algorithm; it is based on the identification of possible orientation `candidates' at each time step, with the dynamics later obtained from maximization of a likelihood function. Analysis of the resulting linear and angular velocities and accelerations reveal a surprising intermittency for an object whose size lies in the integral range, close to the integral scale of the underlying turbulent flow.

References in corpus (3)

• Experimental Lagrangian Acceleration Probability Density Function Measurement
• Turbulent transport of material particles: An experimental study of finite size effects
• On the properties of steady states in turbulent axisymmetric flows

Cited by in corpus (16)

• Bubbly and Buoyant Particle-Laden Turbulent Flows
• Rotational intermittency and turbulence induced lift experienced by large particles in a turbulent flow
• Measurements of the Solid-body Rotation of Anisotropic Particles in 3D Turbulence
• Simultaneous 3D measurement of the translation and rotation of finite size particles and the flow field in a fully developed turbulent water flow
• Kinematics and dynamics of freely rising spheroids at high Reynolds numbers
• Large spheres motion in a non homogeneous turbulent flow
• Translational and rotational dynamics of a large buoyant sphere in turbulence
• Orientation of non-spherical particles in an axisymmetric random flow
• Characterizing flows with an instrumented particle measuring Lagrangian accelerations
• Spherical Ornstein-Uhlenbeck processes
• Motion of finite-size spheres released in a turbulent boundary layer
• Spin and velocity correlations in a confined two-dimensional fluid of disk-shaped active rotors
• Tracking the rotation of light magnetic particles in turbulence
• Three-dimensional tracking of finite-size spheres in a turbulent boundary layer
• Geotropic tracers in turbulent flows: a proxy for fluid acceleration
• Stochastic resonance of rotating particles in turbulence