کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
667674 | 1458522 | 2013 | 16 صفحه PDF | دانلود رایگان |
• The two-group IATE is implemented into a CFD code, ANSYS CFX.
• A combined gas momentum equation is solved for two groups of bubbles.
• New models are developed for lift and bubble-induced turbulent diffusion forces.
• New bubble-induced turbulence model is considered.
The dynamic development of interfacial structure in two-phase flows has been studied by using the interfacial area transport equations with various bubble interaction mechanisms. The two-group interfacial area transport equations are incorporated into a multiphase computational fluid dynamics code in the framework of the two-fluid model which is modified to use a combined gas momentum equation for two groups of bubbles. A benchmark is performed for adiabatic churn-turbulent and cap-turbulent flows in a confined vertical rectangular duct (20 cm × 1 cm) with newly developed hydrodynamic models for lift and bubble-induced turbulent diffusion forces as well as the bubble-induced turbulence. The benchmark results demonstrate improved predictive capability of the two-fluid model with these hydrodynamic models and the two-group interfacial area transport equations.
Journal: International Journal of Multiphase Flow - Volume 57, December 2013, Pages 115–130