2008/11/26 by Enrico Calzavarini, E. CALZAVARINI, R. VOLK +9 · 111 citations
Engineering · Physics and Astronomy · #Acceleration #Dissipative system #Flow (mathematics) #Fluid Dynamics and Turbulent Flows #Fluid dynamics and aerodynamics studies #Independence (probability theory) #Particle (ecology) #Particle Dynamics in Fluid Flows #Particle acceleration #Probability density function #Scale (ratio) #Turbulence #physics.flu-dyn
paper · pdf · doi:10.1017/s0022112009006880
published in Journal of Fluid Mechanics 630, 179-189 (Cambridge University Press) · 10 pages, 4 figures
arxiv created 2008/11/26 · openalex publication_date 2009/06/24 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The dynamics of particles in turbulence when the particle size is larger than the dissipative scale of the carrier flow are studied. Recent experiments have highlighted signatures of particles' finiteness on their statistical properties, namely a decrease of their acceleration variance, an increase of correlation times (at increasing the particles size) and an independence of the probability density function of the acceleration once normalized to their variance. These effects are not captured by point-particle models. By means of a detailed comparison between numerical simulations and experimental data, we show that a more accurate description is obtained once Faxén corrections are included.