چكيده به لاتين
Venturi plays a very important role in different fields of engineering. Considering the fact that Venturi has many positive features, and given the special importance of direct measurement of multiphase flows in recent decades, this study investigates the operation of Venturi in multiphase flows using computational methods that have many advantages. In this thesis, one-phase, two-phase, and three-phase flows have been investigated by Fluent software, the Venturi pressure drop values in these flows are determined by computational fluid dynamics (CFD) and the results are analyzed for the accurate calculation of the venturi discharge coefficient (Cd), and finally the discharge coefficient values are obtained by the available relationships of Venturi. Comparing the values obtained from this simulation and laboratory values shows that the error of this simulation is one percent. Finally, with regard to the Reynolds values and the three-phase flow discharge coefficient, a relation was found for Venturi discharge coefficient in terms of Reynolds and composition percentages. Finally, using the Reynolds values and the calculated three-phase discharge coefficients, a relation was found for Venturi discharge coefficient.
Keywords: Venturi – Multiphase Flow – CFD – Discharge Coefficient – Three Phae Flow
