Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2007-10-17
Physica D 237, 2084-2089 (2008)
Nonlinear Sciences
Chaotic Dynamics
7 pages, 4 figures
Scientific paper
10.1016/j.physd.2008.01.016
We compare experimental data and numerical simulations for the dynamics of inertial particles with finite density in turbulence. In the experiment, bubbles and solid particles are optically tracked in a turbulent flow of water using an Extended Laser Doppler Velocimetry technique. The probability density functions (PDF) of particle accelerations and their auto-correlation in time are computed. Numerical results are obtained from a direct numerical simulation in which a suspension of passive pointwise particles is tracked, with the same finite density and the same response time as in the experiment. We observe a good agreement for both the variance of acceleration and the autocorrelation timescale of the dynamics; small discrepancies on the shape of the acceleration PDF are observed. We discuss the effects induced by the finite size of the particles, not taken into account in the present numerical simulations.
Calzavarini Enrico
Lohse Detlef
Mordant Nicolas
Pinton Jean-François
Toschi Federico
No associations
LandOfFree
Acceleration of heavy and light particles in turbulence: comparison between experiments and direct numerical simulations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Acceleration of heavy and light particles in turbulence: comparison between experiments and direct numerical simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acceleration of heavy and light particles in turbulence: comparison between experiments and direct numerical simulations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-11699