Abstract:  It is a research hotspot and difficulty in the design and optimization of modern agricultural machinery for using the fluidsolid coupling method to solve the impact of the interaction between the material and its flow field in agricultural engineering and the mutual conversion of mass, momentum and energy on the operation effect. Starting from the basic principles of the fluidsolid coupling method, this paper expounds the application status and development trend of the typical fluidsolid coupling method in various aspects of agricultural engineering. This paper analyzes and summarizes the main problems faced by the numerical simulation based on fluidsolid coupling and its application and promotion. It is pointed out that the low reduction degree of agricultural material particle model and the lack of grid model verification method are the further development of fluidsolid coupling method in the field of agricultural engineering. Strengthening the basic research work of particle model and grid drawing will promote the promotion and application of the fluidstructure interaction method in the field of agricultural engineering, and develop in a diversified direction. At the same time, promoting the development of a software platform more suitable for agricultural material modeling, improving computer computing capabilities, and improving model computing efficiency and accuracy are the future research directions and work priorities.

Key words:  fluidstructure interaction, numerical simulation, computational fluid dynamics, discrete element method

摘要： 利用流固耦合方法解决农业工程中物料与其所处流场间相互作用及质量、动量和能量的相互转换对作业效果的影响是现代农业机械设计及优化环节中的研究热点和难点。从流固耦合方法的基本原理出发，阐述在农业工程各典型环节流固耦合方法的应用现状和发展趋势。对基于流固耦合的数值模拟仿真及其应用推广所面临的主要问题进行分析和总结，指出农业物料颗粒模型还原度低和网格模型验证方法缺失是流固耦合方法在农业工程领域中进一步发展的制约因素。加强颗粒模型和网格绘制的基础研究工作，将促使流固耦合方法在农业工程领域得到较大范围的推广与应用，并且向多元化方向发展。与此同时，推动更适合农业物料建模的软件平台开发，提高计算机计算能力，提升模型计算效率和准确性是今后的研究方向和工作重点。

关键词: 流固耦合, 数值模拟, 计算流体力学, 离散元法