Coupling Of Particle Method With Grid Method And Its Application On Solid-Liquid Phase Flow

The corrosion products of nuclear reactor would transport and deposit with the coolant flow, and deposition on the surface of fuel rods and steam generator pipes reduces the heat transfer efficiency and the service life of equipment, and affects the safe and stable operation of reactor, while deposition on the components is the main source of radiation field and seriously threatens to the safety of operation and maintenance staff. In essence the transport and deposition of corrosion products with the coolant flow is about the flowing of solid in liquid, in other words it’s about the solid-liquid phase study.Firstly, the fundamental of MPS (Moving Particle Semi-implicit Method), FVM (Finite Volume Method) and coupling method is introduced, including the discrete methods, weight function, treatment of boundary conditions and combination point of coupling method.Secondly, how to deal with two-phase particles with a small density ratio in solid-liquid phase flowing with MPS method is researched and the effectiveness of MPS method simulating the solid-liquid phase flow is verified based on a model with inverted U-shaped pipe. Then solid-liquid phase flow in a straight pipe model is simulated respectively using MPS and coupling method, and comparative analysis of numerical simulation results was done.Finally, the results show that the coupling method is excellent in both simulation accuracy and computational efficiency. It’s concluded that the coupling method is a new method which is meaningful to the simulation of solid-liquid phase flow.