Deposition and deposit features of inertial particles conveyed by turbulent streams
P.L. Garcia-Ybarra (UNED, Spain) and J.L. Castillo
Distribution of particles near walls in two-phase turbulent flows is analyzed in the limit of large values of the particle Schmidt number and accounting also for the first order correction due to particle inertia. Turbophoresis plays the role of a mean particle drift whereas turbulent and Brownian diffusion contribute to an effective particle random motion. The relative importance of these two particle transport mechanisms (ratio of mean drift to effective diffusion) define the relevant particle Peclet number whose solely value typifies the characteristics of the deposit as the internal structure, the corrugation of the surface and the growing velocity.