Simulation on Air Flow Resistance and Heat Transfer Characteristics of Potato Pile Based on DEM-CFD Method
This study employed a coupled Discrete Element Method(DEM)and Computational Fluid Dynamics(CFD)approach to simulate the aerodynamic resistance and heat and mass transfer characteristics during the storage of the Dutch potato variety No.15 in a semi-underground storage room at Inner Mongolia Agricultural University.Through the parameter calibration and model estab-lishment,the accumulation process of potato particles was simulated.Subsquently,the storage process of the potato heap was simu-lated by using the DEM-CFD coupling method to investigate the effects of porosity and placement position on the aerodynamic resis-tance and heat transfer characteristics of the potato heap when the cellar door is opened and closed.It was found that the low porosity heap had a better thermal insulation effect when the cellar door was closed,while the internal temperature of the low porosity heap was lower when it was opened.In addition,the temperature of the potato pile near the wall was lower than that in the center.When the cellar door was closed,the overall average temperature inside the potato pile near the north and south walls was lower than that in the center by 0.35 ℃,and when the cellar door was open,the overall average temperature inside the potato pile near the north wall was lower than that near the south wall by 0.13 ℃.The internal velocity changes inside the potato pile were minimal,and the tem-perature had limited effect on the speed.Reasonable adjustment of the gap between the potato pile and the wall,especially when the cellar door was open,could effectively control the heat loss and optimize the heat dissipation.The study's findings on the aerodynam-ic resistance and heat transfer characteristics of potato heaps provided valuable insights for improving potato storage technology.
DEM-CFD couplingPotatoSemi-underground storage roomAerodynamic resistanceHeat and mass transfer
万方数据
维普
