Analysis of influence factors of instantaneous arch during silo discharging process based on DEM simulation
To explore the instantaneous arch formation condition of soybeans during the unloading process of silos and the influence rules of various factors on it,and to clarify the rheological characteristics of soybeans in silos,the discrete element method(DEM) was used,and the unloading process of soybeans in the silo was taken as the object to conduct simulations respectively by changing the semi cone angle,opening diameter,inter particle friction coefficient,material density and other parameters of the silo.The results show that when the half cone angles are 30°,35°,and 45°,the maximum pressure values are 2390.76,2289.53,2540.9 Pa,respectively;When the opening diameters are 50,60,70 mm,the unloading time are 103,62,40 s,respectively;When the friction coefficient is set to 0.6,0.7,0.8,the unloading time is 61.9,64.9,67.2s,respectively;When the density is set to 500,750,1000 mm,the maximum mass flow rates are 0.44,0.50,0.67 kg/s,respectively.The study provides a reference for seeking more accurate rheological properties of other bulk foods during the unloading process of silos.
discrete element method(DEM)silounloadinginstantaneous archinfluence factor
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