System for measuring non-linear collision force of particles in liquid phase environment

Abstract

The invention discloses a system for measuring non-linear collision force of particles in a liquid phase environment. The system comprises an environment simulating device, a speed generating device,a collision device, a monitoring device, a data collecting device, a data analyzing device, a balanced modulation device and a collision observing device. The system has the beneficial effects that the non-linear collision acting force between particles and a flat plate, between particles and particles, as well as between particles and spheres can be measured in the liquid phase environment, the particle collision process and the flow field evolution rule can be observed visually, and the dynamic change curve of the collision acting force in the particle collision process can be output at a computer end, so that the particle collision mechanism in the liquid phase environment can be defined clearly. Furthermore, a particle non-linear collision force mathematical model in the liquid phase environment can be built according to an experimental result measured by the system, and can be applied to solid-liquid two-phase flow numerical simulation in order to improve the numerical simulationaccuracy.

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liquid environment The dynamic behavior is more complex, and the traditional rigid collision model for dry particles is no longer applicable.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