Magnetic particle tracing method for measuring fluidization behavior of high-density particles
A particle tracing measurement system is proposed using magnetic tracer particles and magnetoresistance sensor.The composition,measurement principle,error analysis and influencing factors of the magnetic particle tracing experimental system are systematically studied,and its advantages,disadvantages and application range are summarized.It was found that magnetic particles and sensor systems still have good tracking effects,in the coupled environment of the earth's magnetic field and particle magnetic field.Based on the magnetic field induction law,a particle spatial position search algorithm can be established to measure the particle motion trajectory and obtain the fluidization parameters such as the flow direction,movement rate,and circulation frequency of a single particle.However,the magnetic field measurement is affected by many factors,and the development of highly magnetic materials and the improvement of measurement sensor sensitivity are still needed in the future.By measuring and analyzing the circulating rate of the tracer particles in the annular zone in the spouted fluidized bed,the reliability of this method has been demonstrated.This study is helpful for the design and optimization of fluidized bed reactors in the subsequent preparation process,and is a worthy research direction for high-density particle fluidized bed coating technology.
fluidizationtwo-phase flowhigh-density particlesmeasurementmagnetic field strengthmotion trajectory
万方数据
维普
