DEPOSITION OF PARTICLES FROM A TURBULENT FLOW ON THE WALLS OF PIPES AND CHANNELS
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Abstract
The formation of sediment on the walls of pipes and channels has a significant impact on the efficiency
and reliability of technological equipment. The article considers the effect of sediment formation on the process
of ultrafiltration of wastewater from the plant of reinforced concrete structures, representing water-oil emulsions
with a high content of suspended solids. On the basis of the theory of turbulent particle migration developed earlier
by E.P. Mednikov in a shear turbulent gas flow, a solution of the problems of particle deposition on the walls of
circular channels from a viscous fluid flow in a wide range of Schmidt numbers is obtained. The equations for
determining the mass transfer coefficient from the core of the flow to the channel walls for a two–layer boundary
layer according to the Prandtl theory, a three-layer Pocket and a modernized three-layer Landau-Levich were obtained. The results of calculations of the mass transfer coefficient of particles from the flow core to the channel
surface according to the proposed upgraded model showed the highest intensity of deposition of particles with a
diameter of 10 to 40 microns. The adequacy of the model was verified by comparing the calculated parameters
with the results of well-known domestic and foreign researchers and showed good verification.
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