Mathematical and Numerical Modelling of Gas-Solid Turbulent flows in complex geometries

Stella Rodrigues Ferreira¹; João Marcelo Vedovoto¹; Aristeu da Silveira Neto¹

¹ UFU

Resumo

The presence of solid particles in industrial turbulent flows in complex geometries is widely evidenced in engineering. However the correct prediction of flow patterns, particles trajectories and distributions is a highly complex task. The analysis of the particle velocity as well as their trajectories in the gas-solid flow is of fundamental importance. We used an Euler-Lagrangean approach where the dispersed phase is treated in the Lagrangean referential and the governing equations for the continuous phase are solved in the Eulerian referential. An advantage of the application of the Immersed Boundary Method is that the immersed geometry is also represented in the Lagrangean referential. It is worthy to recall that one of the advantages of the Immersed boundary methodoly is the capability of solving flows in the presence of complexes geometries in Cartesian grids, which facilitates the particle tracking of solid particles in LES. By performing Large Eddy Simulations we demonstrate, in the present work, that it is possible to predict complex multiphase flows by combining promising methodologies like LES and Immersed Boundary Methodology. The fully parallel in house code developed was validated face to experimental results of Sommerfeld and S.Lain (2001) with very good accuracy.

Palavras-chave: CFD; Complex geometries; Immersed Boundary Method; solid particles