Fluctuations of Particles Concentration in Fast Rotating Turbulent Flow Conference Paper uri icon

abstract

  • Two types of intermittency of number density of particles in fast rotating turbulent incompressible fluid flow are discussed. Fast rotation and particles inertia imply the divergent particles velocity field and result in both, intermittency in spatial distribution of particles and formation of the large-scale inhomogeneous structures. Intermittency in the systems with and without external pumping is studied. Fast rotation causes anomalous scaling already in the second moment of inertial particles number density and may result in excitation of a small-scale instability of inertial particle distribution which leads to formation of small-scale particles clusters. A non-zero mean helicity of fluid flow causes an additional mean nondiffusive turbulent flux of inertial particles. This results in an excitation of instability and formation of large-scale inhomogeneities in spatial distribution of aerosols. Analyzed effects of formation of inhomogeneities of particles distribution in fast rotating turbulent fluid flow are applied in atmospheric, astrophysical and industrial turbulent rotating flows.

publication date

  • January 1, 1999