School of Engineering, The University of Queensland
Abstract
Previous study of authors showed that kappa-taf turbulence model has a good accuracy for prediction of hydrodynamic behaviour of near wall turbulence in a gas-solid boundary layer flow. In that study two-phase kappa-taf model was derived from Yokomine et al. modified kappa-epsilon model. In the present study, a new version of two phase kappa-taf turbulence model has been presented. In this model we use Adeniji et.al. modifications to account for the effect of solid particles both on the turbulence kinetic energy and it's dissipation rate. The new modified kappa-taf has been compared with the later version of kappa-taf for prediction of flow behaviour in near wall region of two-phase boundary layer. The governing equations for two-phase boundary layer flow with Eulerin-Eulerian approach by two different modified kappa-taf turbulence models have been solved numerically using finite volume method. In comparison with available experimental data, the obtained results by modified kappa-taf, based on Yokomine et al. modifications, have better agreement than modified kappa-taf based on Adeniji et al. model
