离散元法在农业工程领域的应用进展

简述了离散元法在农业工程领域方面的研究成果,根据离散元法在农业工程领域的不同应用,分别讨论了离散元法在土壤散体颗粒、农业物料颗粒、多相流中单相介质的应用研究现状,指出了存在数量级受限,颗粒模型不精准,复杂工况制约等问题。提出今后离散元法的研究趋势:开发农业工程领域的专用离散元软件,提高颗粒群的运算效率;通过准确获取物料的细观参数,从理论基础上完善接触模型,使仿真颗粒与真实颗粒更为接近;通过离散元法软件与其他软件耦合,结合API的二次开发,拓宽离散元法在复杂散体颗粒运动仿真的应用。

Application Progress of Discrete Element Method in Agricultural Engineering

This paper introduced the research results of discrete element method in the field of agricultural engineering, according to the different aspects in agricultural engineering realm, discussed discrete element method recently application situation in the soil grain, agricultural particle material, single medium in multiphase flow, respectively, and pointed out some corresponding problems, like the limited orders of magnitude, inaccurate particle model, complicated work condition, etc. Proposed the future research trend of discrete element method: developed professional discrete element method software for agricultural, improved the efficiency of the operation of particle group; through accurately gained the material mesoscopic parameters, perfected contact model at the theoretical basis, in order to make result of simulation and real experiment closely; coupled discrete element method with other software, through the API secondary development, broaden the application of discrete element method in particles complex movement.