Gas-particle flows are very commonly found in pharmaceutical, chemical and petroleum industries. The optimization of the operations involved normally requires a detailed knowledge of the very intrinsic phenomena that take place within the equipment handling the mixture. Once multiphase flows have peculiar characteristics, their behavior should be extensively evaluated. One of these characteristics is the turbophoresis, which occurs in turbulent confined gas-solid flows. The dispersed phase concentrates at the walls and forms a segregated particle flow, where high mass-loading effects become important. Thus, in this work the Euler/Lagrange approach to three-dimensional unstructured meshes is used to numerically assess the turbophoretic effect. The influence of the coupling between phases (two- and four-way coupling) and wall roughness are taken into account. Results show that the particle deposition depends on the coupling and wall roughness. Four-way coupling effects are observed to increase the turbophoresis phenomenon and modify the gas phase dynamics.

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