ABSTRACT
Motion of a Corpuscle ................................................................. 123 7.5 Estimation of Accuracy of Scalings ............................................. 126 7.6 Mathematical Model of Process of a Dust Separation in the
Apparatus ..................................................................................... 127 7.7 Conclusions .................................................................................. 133 Keywords .............................................................................................. 134 References ............................................................................................. 134
7.1 INTRODUCTION
Theoretical and to an experimental research of multiphase turbulent flows books Zhou (1993) are devoted, to Volkova et al. (1994), Gorbis and Spokoyny (1995), Crowe et al. (1998), Varaksina (2003) and surveys Eaton and Fessler (1994), Elghobashi (1994), McLaughlin (1994), Crowe et al. (1996), Simonin (1996), Zajchika and Pershukova (1996), Loth (2000), Sommerfeld (2000), Mashayek and Pandya (2003). In these books and surveys many questions connected with hydrodynamics and heat exchange of turbulent flows are taken up. In spite of the fact that the first work under the theory of dispersion turbulent flows has appeared rather for a long time (Barenblatt, 1953), intensive development of this area of mechanics and heat exchange was initiated only last 20 years. The basic theoretical problems originating at modelling of two-phase dispersion turbulent flows in comparison with monophase, are connected with following physical processes: interacting of corpuscles (drops, vials) with turbulent whirlwinds of a continuous phase; interacting of corpuscles with each other as a result of collisions; changes of phase, concretion or crushing; effect turbulent fluctuations for speed of changes of phase; interacting of corpuscles with a surface restricting a stream and sedimentation; return effect of corpuscles on turbulence; a dispersion, accumulation and fluctuations of concentration of corpuscles. The most exact and detailed information on formation of a turbulent multiphase stream can be gained on the basis of application of a method of direct numerical modelling (DNS) for the bearing continuous medium in a combination to stochastic approach Lagrange for a dispersoid. At direct numerical modelling all spectrum of turbulent whirlwinds, including fine-scale, responsible for a dissipation of energy of turbulence is presented [1-25].
