Distribution of velocity gradients and rate of caustic formation in turbulent aerosols at finite Kubo numbers

• In a one-dimensional model for a turbulent aerosol (inertial particles suspended in a random flow) we compute the distributions of particle-velocity gradients and the rate of caustic formation at finite but small Kubo numbers, Ku, for arbitrary Stokes numbers, St. Our results are consistent with those obtained earlier in the limit Ku -> 0 and St -> infinity such that Ku(2)St remains constant. We show how finite-time correlations and nonergodic effects influence the inertial-particle dynamics at finite but small Kubo numbers.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

inertial particles

statistics

collision

dynamics

fields

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)