On the role of the history force for inertial particles in turbulence

Abstract

The history force is one of the hydrodynamic forces which act on a particle moving through a fluid. It is an integral over the full time history of the particle's motion and significantly complicates the equations of motion (accordingly it is often neglected). We present here a study of the influence of this force on particles moving in a turbulent flow, for a wide range of particle parameters. It is shown that the magnitude of history force can be significant and that it can have a considerable effect on the particles' slip velocity, acceleration, preferential concentration and collision rate. We also investigate the parameter dependence of the strength of these effects.

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• History effects in the sedimentation of light aerosols in turbulence: the case of marine snow
• Particle-Pair Relative Velocity Measurement in High-Reynolds-Number Homogeneous and Isotropic Turbulence Using 4-Frame Particle Tracking Velocimetry
• A numerical approach for particle-vortex interactions based on volume-averaged equations
• Physical pendulum model: Fractional differential equation and memory effects
• Irreversibility-inversions in 2 dimensional turbulence
• Trapping and extreme clustering of finitely-dense inertial particles near a rotating vortex pair
• The effect of gravity on bubble-particle collisions in turbulence
• Motion of a Rigid Body in a Special Lorentz Gas: Loss of Memory Effect
• Relevance of the Basset history term for Lagrangian particle dynamics
• Statistics of relative velocity for particles settling under gravity in a turbulent flow
• Caustics of finitely dense inertial particles