Study On Interaction Of Solid Particles In Liquid Phase Environment

With the development of national economy,oil and natural gas have become an important energy source for national life and production.Solid particles affect every link of oil and gas production.For example,adhesion of hydrate particles or wax particles in pipelines will lead to the decrease of pipeline circulation area and even blockage of pipelines,which causes pipeline flow assurance problems,such as hydrate freezing and wax deposition,and brings serious security risks and economic losses.Therefore,in order to ensure safe and efficient oil and gas production and transportation,it is very important to study the interaction of solid particles in liquid phase.Based on wet adhesion theory,the dynamic adhesion process of solid particles in liquid phase is studied by finite element simulation and theoretical analysis.Hydrodynamics force is used to characterize dynamic viscous adhesion of particles,and we quantitatively analyze the effect of boundary conditions on hydrodynamic force,including surface compliance,surface roughness and the compliance of measurement system.In order to explore the relationship between particle properties and deformation,we use flat-ended indentation curve to characterize the deformation of the particles.We develop a complex particle property-deformation prediction model by combination of dimensionless analysis and 1050 finite element analysis models,and propose a method to predict the shell thickness t and yield strength s_y of particle by using the indentation curve obtained from a single particle indentation experiment.Finally,we study the reliability of the complex particle property-deformation prediction model.Compared with the simulation results and experimental results,the calculation result of the numerical model is within the error range,and the calculation result of the shell thickness t is more reliable than the calculation result of the yield strength s_y.