TY - GEN
T1 - Diffusion of heavy particles in turbulent flows
AU - Lanotte, A.S.
AU - Bec, J.
AU - Biferale, L.
AU - Cencini, M.
AU - Scagliarini, Andrea
AU - Toschi, F.
PY - 2009
Y1 - 2009
N2 - Relative dispersion of tracers - i.e. very small, neutrally buoyant particles-, is particularly efficient in incompressible turbulent flows. Due to the non smooth behaviour of velocity differences in the inertial range, the separation distance between two trajectories, $R(t) = X_1(t) - X_2(t)$, grows as a power of time superdiffusively, $\langle R^2(t) \rangle~\alpha t^3$, as first observed by L.F. Richardson [1]. This now well established result has no counterpart in the theory of heavy particle suspensions, namely finite-size particles with a mass density much larger that of the carrier fluid. The complete knowledge of particle properties of mixing in turbulent flows -yet an open problem-, is of great importance in cloud physics, or in estimating pollutant dispersion for hazardous safety purposes.
AB - Relative dispersion of tracers - i.e. very small, neutrally buoyant particles-, is particularly efficient in incompressible turbulent flows. Due to the non smooth behaviour of velocity differences in the inertial range, the separation distance between two trajectories, $R(t) = X_1(t) - X_2(t)$, grows as a power of time superdiffusively, $\langle R^2(t) \rangle~\alpha t^3$, as first observed by L.F. Richardson [1]. This now well established result has no counterpart in the theory of heavy particle suspensions, namely finite-size particles with a mass density much larger that of the carrier fluid. The complete knowledge of particle properties of mixing in turbulent flows -yet an open problem-, is of great importance in cloud physics, or in estimating pollutant dispersion for hazardous safety purposes.
U2 - 10.1007/978-3-642-03085-7_116
DO - 10.1007/978-3-642-03085-7_116
M3 - Conference contribution
SN - 978-3-642-03084-0
T3 - Springer Proceedings in Physics
SP - 485
EP - 488
BT - Advances in Turbulence XII (Proceedings of the 12th EUROMECH European Turbulence Conference, Marburg, Germany, September 7-10, 2009)
A2 - Eckhardt, B.
PB - Springer
CY - Berlin
T2 - conference; 12th EUROMECH European Turbulence Conference; 2009-09-07; 2009-09-10
Y2 - 7 September 2009 through 10 September 2009
ER -