TY - GEN
T1 - About scaling properties of relative velocity between particles in turbulence
AU - Lanotte, A.S.
AU - Bec, J.
AU - Biferale, L.
AU - Cencini, M.
AU - Toschi, F.
PY - 2011
Y1 - 2011
N2 - We present results obtained from high-resolution direct numerical simulations (DNS) of incompressible, statistically homogeneous and isotropic turbulence, up to a Taylor scale based Reynolds number Re¿ 200 and with millions of heavy particles with different inertia. In our set-up, particles are assumed to be spherical and rigid, they simply move by viscous forces, such as the Stokes drag. The velocity statistics is found to be extremely intermittent, with an almost bi-fractal behavior. Here, we consider also a new data analysis for the stationary distribution of rescaled longitudinal velocity difference and further assess the intermittent character of the heavy particles velocities, characterized by the presence of quasi-algebraic tails.
AB - We present results obtained from high-resolution direct numerical simulations (DNS) of incompressible, statistically homogeneous and isotropic turbulence, up to a Taylor scale based Reynolds number Re¿ 200 and with millions of heavy particles with different inertia. In our set-up, particles are assumed to be spherical and rigid, they simply move by viscous forces, such as the Stokes drag. The velocity statistics is found to be extremely intermittent, with an almost bi-fractal behavior. Here, we consider also a new data analysis for the stationary distribution of rescaled longitudinal velocity difference and further assess the intermittent character of the heavy particles velocities, characterized by the presence of quasi-algebraic tails.
U2 - 10.1088/1742-6596/318/5/052010
DO - 10.1088/1742-6596/318/5/052010
M3 - Conference contribution
T3 - Journal of Physics: Conference Series
BT - 13th European Turbulence Conference (ETC13)
ER -