Liquid-solid Two-phase Flow Erosion Corrosion Numerical Simulation Studies

There is wide industrial background for multi-phase flow erosion and corrosion, which includes complex flow and mass-transfer theories. It is very useful and valuable to study erosion and corrosion phenomenon from both theoretical aspect and engineering application aspect.In this paper, a combined model is used to simulate liquid-solid two-phase flow. The model that is built by computational fluid dynamics (CFD) includes three main parts: to obtain fluid field by solving Reynolds time-averaging equations for fluid phase under Euler coordinate system, to simulate solid particle phase by using stochastic trajectory mode under Lagrange coordiante system, to get the erosion rate by adopting Finne cutting-erosion equation modified by Bergevin. In order to validate the accuracy of the model and the correctness of the computation program in this paper, experiment research is carried out in the collaborate institution, Metal Corrosion and Protection Institute of China Academy of Sciences.Fluid field is studied under different disk rotating rate. Some important macro-variables, such as rotat, particle diameter and particle concentration have been numerically expamined to get the detail mean particle impact character. For further understanding the particle movement process, different sized particle's movement track and particle concentration distribution are also studied. Some significative conclusions are obtained at the end of this thesis.Finally, the comparison of the results of simulation and experiment shows that the mass loss trend of the metal sample is accordant. The comparsion indicates that the model in the thesis is basically correct and feasible.Some significant suggestions are put forward for further study at last.