Batchelor, G.K., 1967, An Introduction to Fluid Dynamics, Cambridge University Press, New York.
 Versteeg, H. K., Malalasekera W., “An Introduction to Computational Fluid Dynamics – The Finite Volume Method”, Longman Group Ltd, 1995
 Kubota A., Kato H., Yamaguchi H.: A New Modeling of Cavitating Flows: A Numerical Study of Unsteady Cavitation on a Hydrofoil Section. J. Fluid Mech. 1992
 Senocak I., Shyy W.: Evaluation of cavitation models for Navier-Stokes computations, Proceeding of FEDSM 02, ASME fluid engineering division summer meeting, Montreal, Canada, 2002
 Lee et al., 1992; Kinnas and Fine, 1993, and Euler/Navier‐Stokes equation‐based models (Chen and Heister, 1994; Deshpande et al., 1997).
 Delannoy and J. L. Kueny, “Cavity flow predictions based on the Euler equations,” in Proceedings of the ASME Cavitation and Multi-Phase Flow Forum, vol. 109, pp. 153–158, Portland, Ore, USA, June 1990.
Tikrit Journal of Engineering Sciences (2013) 20(3) 75-87
Experimental and Simulation of Dual Phase Flow in Venture Convergence-Divergence Nozzle
|Fayadh Mohamed Abed||Maki Hag Zedan||Ghazi Yousif Mohammed||Seenaa Khudhayer Salman|
|Mechanical Engineering Department, Tikrit University, Iraq|
In steam power plants, and high pressure high temperature water flow, phase change takes place resulting in bubbly flow. Such flow causes vibration and noise in the conduits. The present study emphasized on cavitations during a dual phase flow (water-vapor) with a variation of velocities at different conditions in converge-divergence nozzle. The investigation was carried out experimentally and numerically, by CFD simulation. A transparent material is used of PMMA in order to visualize the various regions of the flow. Furthermore, the effect of flow velocities on vibration and noise was evolved in the experimental measurements. The CFD simulation model of this problem is defining a dual compressible viscous flow with k-epsilon model for the turbulence modeling. The analyses of the simulation results and the experimental observation have been seen to be comparatively conscionable in the cavitation zone and the estimation of the throat pressure cavitations during a dual phase flow with a variation of mass transfer conditions. A model were combined with a linear viscous turbulent model for the mixed fluids in the computational fluid dynamics software. A CFD Code with modified user intervention is used to simulate steady cavitation. Some of the models were also tested using a three dimensional CFD code in configurations of cavitation on three-dimensional a converge-diverge sections. The pressure distributions and volume fractions of vapor at different cavitation numbers were simulated, which agreed well with experimental data.
Keywords: Cavitation’s, Evaporation, Condensation, Convergence –divergence Nozzle, Bubbly Flow.