振动一维流化浅床中颗粒随机扩散的研究

A STUDY ON RANDOM PARTICLE DIFFUSION IN A ONE DIMENSIONAL VIBRATORY SHALLOW FLUIDIZED BED

用随机过程的理论推导出了牛顿型流体(或拟流体)的微元动量、速度和位移的分布,并在振动一维流化床中进行了实验验证。结果说明在适宜的流化条件下,床内的颗粒运动具有马尔柯夫性,指出随机过程理论可用于流态化的前景。

Element momentum, velocity and translation probability distributions for a Newtonian fluid(or pscudo-fluid) are established by implementing the-stochastic theory. Theoretical distributions as derived show excellent agreement with all the sets of data from rigorous lab-scale experiments in a one dimensional vibratory shallow fluidized bed under various opera ting conditions. The paper also demonstrates that the movement of particles is a Markov process under proper fluidization. All these indicate the perspective of further implementing the stochastic theory in fluidization.