Optimisation of calibration parameters for a discrete element method (DEM) model of plant-origin grains with a low elasticity modulus

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2024-06-17 DOI:10.1016/j.powtec.2024.120009

Krzysztof Ligier, Oleksandr Vrublevskyi, Jerzy Napiorkowski

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Abstract

This paper presents the application of the Discrete Element Method (DEM) to describe the physical properties of plant-origin grains with a low elasticity modulus for the needs of numerical simulation of processing processes. The study proposes the modelling of maize grains based on 3D scanning of real grains and further use of the multi-sphere method to fill the numerical model with a conglomerate of elementary spheres. The main aim of the paper is to develop a calibration method based on exploring parameter spaces at points selected using Sobol's grids. As criteria and functional limitations for the calibration, the following were proposed: the slope angle of repose (AoR), the radius of the heaped cone's vertex (Rad), the number of grains, and the slope height. The study results show that for the calibration of the DEM model describing maize grains, test points with a set of the following nine parameters should be used: Poisson's Ratio for grain, Density of grain, Shear Modulus, Coefficient of Restitution for grain-grain, Coefficient of Restitution for grain-material, Coefficient of static friction for grain- grain, Coefficient of static friction for grain-material, Coefficient of rolling friction for grain-grain, and Coefficient of rolling friction for grain-material.

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优化低弹性模量植物源谷物离散元素法（DEM）模型的校准参数

本文介绍了离散元素法（DEM）在描述低弹性模量植物原生谷物物理性质方面的应用，以满足加工过程数值模拟的需要。该研究建议在对真实谷物进行三维扫描的基础上建立玉米谷物模型，并进一步使用多球体法用基本球体的集合体填充数值模型。本文的主要目的是开发一种校准方法，该方法基于在使用 Sobol 网格选择的点上探索参数空间。作为校准的标准和功能限制，提出了以下几点：斜坡倾角 (AoR)、堆锥顶点半径 (Rad)、颗粒数量和斜坡高度。研究结果表明，在校准描述玉米粒的 DEM 模型时，应使用包含以下九个参数的测试点：谷物泊松比、谷物密度、剪切模量、谷物-谷物归还系数、谷物-材料归还系数、谷物-谷物静摩擦系数、谷物-材料静摩擦系数、谷物-谷物滚动摩擦系数、谷物-材料滚动摩擦系数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.