The Applicability Analysis Of The Usually Applied Turbulence Models And The Numerical Simulation Of The Flow Around A Foil Using VOF Method

Turbulence simulation has been more and more widely used in engineering design as the developing of computer science, and the choose of congruent turbulence model is very important. And since the flow problem with free surface is widely exsited ,the study of numerical simulation of free surface is significative to the engineering.This dissertation is constituted by the applicability analysis of the most usually applied turbulence models and the numerical simulation of the flow around NACA 0024 foil with free surface. The development of the turbulence model theory has been reviewed, and most of the turbulence models and the numerical methods used for turbulence flow simulation have been described systematically. Meanwhile, the applicability of the most usually applied turbulence models: Standard k -εturbulence model, RNG k -εturbulence model, Low-Re k -εturbulence model, Standard k -ωturbulence model and Large Eddy Simulation method (LES) has been analyzed. Then a numerical simulation of the Large Diameter Jet Impingement Flow is performed, which matches well with the experimental results of the University of Minnesota.The numerical simulation of the flow around NACA 0024 foil with free surface under three different Froude numbers is conducted by applying Finite Volume Method (FVM) and Volume of Fluid (VOF) method combined with PLIC interface reconstruction method. The numerical results shows a good agreement with the experimental results supplied by IIHR-Hydroscience & Engineering, IOWA University in the aspect of free surface wave-induced boundary layer separation and the wave pattern of the foil.