Numerical simulation of turbulent gas-particle flow in a 90 degrees bend: Eulerian-Eulerian approach

A numerical investigation into the physical characteristics of dilute gas--particle flows over a square-sectioned 90° bend is reported. The modified Eulerian two-fluid model is employed to predict the gas--particle flows. The computational results using both the methods are compared with the LDV results of Kliafas and Holt, wherein particles with corresponding diameter of 50 µm are simulated with a flow Reynolds number of 3.47 × 105. RNG-based k-E model is used as the turbulent closure, wherein additional transport equations are solved to account for the combined gas--particle interactions and turbulence kinetic energy of the particle phase turbulence. Moreover, using the current turbulence modelling formulation, a better understanding of the particle and the combined gas-particle turbulent interaction has been shown. The Eulerian--Eulerian model used in the current study was found to yield good agreement with the measured values.