A measurement system for nonlinear collision force of particles in liquid environment

Abstract

The invention discloses a particle nonlinear collision force measurement system in a liquid phase environment, comprising an environment simulation device, a velocity generating device, a collision device, a monitoring device, a data collection device, a data analysis device, a balance modulation device and a collision observation device. The invention has the beneficial effects of being able to measure the non-linear collision force between particles and flat plates, particles and particles, and spheres in a liquid phase environment, and can intuitively observe the particle collision process and the evolution law of the flow field, and can output it on the computer terminal The dynamic change curve of the collision force during the particle collision process helps to clarify the particle collision mechanism in the liquid phase environment, and then the mathematical model of the particle nonlinear collision force in the liquid phase environment can be established according to the experimental results measured by the device, and can be The model is applied to the numerical simulation of solid-liquid two-phase flow to improve the accuracy of numerical simulation.

Description

technical field [0001] The invention belongs to the technical field of data measurement, and relates to a particle nonlinear collision force measurement system in a liquid phase environment. Background technique [0002] Solid-liquid two-phase flow exists widely in chemical industry, petroleum, environment, mining and other industrial and natural fields. During the flow process, the collision between solid phase particles and between them and the flow channel wall directly affects the law of two-phase flow. The traditional rigid collision model believes that during the collision process, the collision bodies are all rigid, and the force between the solid phases is generally calculated based on the spring-stick pot model, while in the solid-liquid two-phase flow, the particle collision in the liquid environment The dynamic behavior is more complex, and the traditional rigid collision model for dry particles is no longer applicable. However, in the existing simulations of sol...

AI Technical Summary

Problems solved by technology

The traditional rigid collision model believes that during the collision process, the collision bodies are all rigid, and the force between the solid phases is generally calculated based on the spring-stick pot model. In the solid-liquid two-phase flow, the particle collision in the liquid environment produces The dynamic behavior is more complex, and the traditional rigid collision model for dry particles is no longer applicable

However, in the existing simulations of solid-liquid two-phase flow, most of the calculations of the particle collision contact force are still based on the spring-stick pot model, which is simplified by introducing elastic coefficients and damping coefficients, and directly based on the amount of overlap between particles. The collision model calculates the contact force, ignoring the influence of the liquid on the solid phase force before the solid phase contacts, which leads to deviations between the simulation results and the actual situation