Abstract
Gas–particle two-phase turbulent flows at various loadings in horizontal and inclined ducts are studied. The upgraded thermodynamically consistent two-phase flow model which includes a low Reynolds number fluid-phase turbulence closure is used in the analysis. The governing equations are discretized with the aid of a semi-implicit numerical algorithm. The case of low-concentration gas–particle turbulent flow in a horizontal channel is first analyzed, and the predicted mean velocity and solid volume fraction profiles are favorably compared with the available experimental data. Additional flow properties such as the phasic fluctuation energy and fluctuation energy production and dissipation, as well as the phasic and total normal and shear stress profiles are also presented and discussed. The case of gas–particle flow in a duct with an inclination is then analyzed. Sample model predictions for both dilute and nondilute two-phase turbulent flows under various conditions are presented. The effect of particle diameter on variation of flow properties is also studied.
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