Analysis on factors of induced air flow field and dust generation in process of material transfer based on CFD-DEM
In this article,in order to reveal the law of dust transfer of the particle materials in the belt-conveying process,ef-forts are made to deduce the equation of the induced air flow for the particle materials with the horizontal initial velocity,and both the particle distribution and the induced air flow field characteristics in the transferring process are explored with the help of the CFD-DEM coupling method.Then,the effects of the blanking height,the mass flow and the initial velocity of the particle materi-als on the particle escape and the induced air flow are analyzed.The results show that the particle velocity increases gradually in the arc falling stage of the particle materials;it decreases first and then increases in the extrusion collision stage of the particle materials;finally,it tends to be stable,and some particles escape.The dust-laden air flow diffuses obviously in the arc falling stage and the extrusion collision stage of the particle materials;the induced air flow's velocity is directly proportional to the parti-cle materials'mass flow and initial velocity;the mass flow of the particle materials is a power function of the induced air flow's velocity,and the power exponent of the fitting curve is about 0.6~0.74.
CFD-DEMtransfer of particle materialsinduced airanalysis on flow field