Effects of Gravity on the Acceleration and Pair Statistics of Inertial Particles in Homogeneous Isotropic Turbulence
نویسندگان
چکیده
This Article is brought to you for free and open access by the Engineering Technology at ODU Digital Commons. It has been accepted for inclusion in Engineering Technology Faculty Publications by an authorized administrator of ODU Digital Commons. For more information, please contact [email protected]. Repository Citation Parishani, H.; Ayala, O.; Rosa, B.; Wang, L.-P.; and Grabowski, W. W., "Effects of Gravity on the Acceleration and Pair Statistics of Inertial Particles in Homogeneous Isotropic Turbulence" (2015). Engineering Technology Faculty Publications. 21. http://digitalcommons.odu.edu/engtech_fac_pubs/21
منابع مشابه
Modulation of homogeneous turbulence seeded with finite size bubbles or particles
0301-9322/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.ijmultiphaseflow.2009.11.001 * Corresponding author. Tel.: +1 401 863 1482; fax E-mail address: [email protected] (M.R. Max 1 Present address: Department of Mathematics, Purd IN 47907, USA. The dynamics of homogeneous, isotropic turbulence seeded with finite sized particles or bubbles is investigated in a series of numerical simu...
متن کاملSweep-stick mechanism of heavy particle clustering in fluid turbulence.
It is proposed that the inertial range clustering of small heavy particles in fluid turbulence occurs as a result of the sweep-stick mechanism which causes inertial particles to cluster so as to mimic the clusters of points where the fluid acceleration is perpendicular to the direction of highest contraction between neighboring particles. Direct numerical simulations of inertial particles subje...
متن کاملAcceleration Statistics of Inertial Particles from High Resolution DNS Turbulence
We present results from recent direct numerical simulations of heavy particle transport in homogeneous, isotropic, fully developed turbulence, with grid resolution up to 512 and Rλ ≈ 185. By following the trajectories of millions of particles with different Stokes numbers, St ∈ [0.16 : 3.5], we are able to characterize in full detail the statistics of particle acceleration. We focus on the prob...
متن کاملHow gravity and size affect the acceleration statistics of bubbles in turbulence
We report the results of the first systematic Lagrangian experimental investigation in a previously unexplored regime of very light (air bubbles in water) and large (D/η 1) particles in turbulence. Using a traversing camera setup and particle tracking, we study the Lagrangian acceleration statistics of ∼3mm diameter (D) bubbles in a water tunnel with nearly homogeneous and isotropic turbulence ...
متن کاملLagrangian stochastic models for turbulent relative dispersion based on particle pair rotation
The physical picture of a fluid particle pair as a couple of material points rotating around their centre of mass is proposed to model turbulent relative dispersion in the inertial range. This scheme is used to constrain the non-uniqueness problem associated to the Lagrangian models in the well-mixed class and the properties of the stochastic process derived are analysed with respect to some tu...
متن کامل