Separation Of Particulate Matter In High-vibration Environments And Formation Mechanism

Much attention of physicists have been devoted to granular materials in the recent years. However, there are still many phenomena appearing in granular matters cannot be explained completely. Especially also remain to study to movement law and mechanism of the granular materials under the vibration condition deeply. This thesis is directed primarily to separation phenomena appeared under the environment of vibration of granular materials, use the mean field theory thought and statistical mechanics method, through calculating with number value the means analyzes and studies the movement tendency of the granular materials and distributes the law, in order to the formation mechanism of seeking the vibration of granular materials and size segregation. Edwards, M.Tarzia,et al. constructed vibration separate model succeed in explain vertical vibrant granular segregation, but unable to explain horizontal vibrant granular segregation. This thesis based on Edwards, M.Tarzia's models for general vertical vibration of particle including generalized potential at the foundation of model, included E-M not merely, explain vertical vibrant particle separate the phenomenon, have explained the phenomenon of horizontal vibration granular segregation successfully too. This model can also be further popularized to explain that separate the phenomenon in vibration of particle including other potential. This thesis uses this method to calculate the horizontal vibration system that the granule of 2 kinds of different size makes up. The result shows: in the course of vibration, the big particle will assemble to centre of the plate , The large particle probability of occupying the lattice of centre is large. Granular segregation to receive because of system external vibration force and received by it a certain potential field cause act on together. This has announced the granular materials appears in the physical mechanism of separating phenomenon of vibration in a certain extent.This thesis mainly has the following innovation: (1)Have set up a particle vibration model including generalized potential, general and right even more than E-M model. (2)Calculate horizontal vibration particle of state distribute trend, explain horizontal vibration particle of system separate the phenomenon to a certain extent for the first time.(3) Propose granular segregation to act on, lead to the fact together because of vibration and potential field system receive for the first time.Research and analyse through being herein, can have further understanding to the movement characteristic of the granular materials, there is deeper understanding to segregation and mechanism to the vibration of granular materials. To this Industrial technology of separating different particles in food industry, chemical industry and transporting granular materials through the pipeline has directive significance in theory.