Numerical computation of turbulent gas-particle flow in a backward-facing step. Model comparison with experimental data
Paper i proceeding, 2008

In the present article, the predictions of two models describing turbulent gas-particle flow in a vertically oriented backward-facing step are compared to each other and with literature data. The first model is an Eulerian approach based upon the kinetic theory of granular flow, including turbulence modulation and interaction with the continuous phase. The gas-phase turbulence is predicted by use of a k-epsilon dispersed turbulence model, including inter-phase energy transfer between gas and particle fluctuating motions. The second model also uses an Eulerian approach coupled to a k-omega turbulence model. The latter model considers the transport of particles to the near-wall region due to turbulence intensity gradients, and particulate phase influences on the gas flow. It is shown that the combined effect has an impact on the two-phase flow. The derived models are validated with benchmark experimental results of a planar sudden expansion turbulent flow including particles.

Författare

Aldo Benavides

Chalmers, Tillämpad mekanik, Strömningslära

Berend van Wachem

Chalmers, Tillämpad mekanik

Tobias Strömgren

Geert Brethouwer

Gustav Amberg

Arne Johansson

Proceedings 11th International Conference on Multiphase Flow in Industrial Plants, MFIP 2008. September 7-10, Palermo, Italy.

63-70

Ämneskategorier

Strömningsmekanik och akustik

ISBN

88-88198-13-X