Numerical Simulation of Conveying Fine Powders in a Screw Conveyor Using the Discrete Element Method

IF 0.7 Q3 ENGINEERING, MULTIDISCIPLINARY
Marko Motaln, T. Lerher
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引用次数: 0

Abstract

Due to their high efficiency and spatial utilization, screw conveyors are widely used in pharmacy, agriculture, and industry. Recently, this has made it a popular research subject in the numerical modelling of the transport of bulk solids. Modelling of granular systems at the level of individual particles is mainly possible due to the use of discrete numerical methods. The most common is the use of the Discrete Element Method (DEM), which is still limited from the point of view of simulations on an industrial scale, as increasing the size of the system also increases the cost of simulation. Certain powders with low density, large angles of repose, poor fluidity, and bad flowability can accumulate during transportation, causing inaccurate and non-uniform movement. Additionally, the friction and impact between the particles can cause wear. To address these issues, the present study utilizes the discrete element method to simulate and analyse powder transportation in an inclined screw conveyor using the commercial software ANSYS-ROCKY. Numerous phenomena that arise while transporting and feeding small-sized or irregularly shaped particles, often present in industrial processes, remain insufficiently investigated. This paper aims to analyse the transportation process of adhesive powders in a screw conveyor, with a focus on evaluating the impact of different screw blade speeds on transport. Multiple simulations were conducted, along with the implementation of an additional wear model, to better understand the transport phenomena and wear. An example was used to demonstrate the impact of screw speed on the wear of the transporter due to the interaction between the material and the structure of the conveyor, power consumption, and performance.
螺旋输送机输送细粉料的离散元法数值模拟
螺旋输送机由于其高效率和空间利用率高,在制药、农业和工业中得到了广泛的应用。近年来,这已成为块状固体输运数值模拟的一个热门研究课题。由于使用离散数值方法,在单个颗粒水平上对颗粒系统进行建模主要是可能的。最常见的是使用离散元法(DEM),从工业规模模拟的角度来看,它仍然是有限的,因为增加系统的规模也会增加模拟的成本。某些密度低、休止角大、流动性差、流动性差的粉末在运输过程中会积聚,造成运动不准确、不均匀。此外,颗粒之间的摩擦和冲击会导致磨损。为了解决这些问题,本研究采用离散元方法,利用商业软件ANSYS-ROCKY对倾斜螺旋输送机中的粉末输送进行了模拟和分析。在运输和输送小尺寸或不规则形状的颗粒时出现的许多现象,经常出现在工业过程中,仍然没有得到充分的研究。本文旨在分析胶粘剂粉末在螺旋输送机中的输送过程,重点评价不同螺旋叶片转速对输送的影响。为了更好地理解输送现象和磨损情况,研究人员进行了多次模拟,并建立了一个额外的磨损模型。通过算例分析了由于物料与输送机结构、功率消耗和性能的相互作用,螺旋转速对输送机磨损的影响。
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
TEHNICKI GLASNIK-TECHNICAL JOURNAL
TEHNICKI GLASNIK-TECHNICAL JOURNAL ENGINEERING, MULTIDISCIPLINARY-
CiteScore
1.50
自引率
8.30%
发文量
85
审稿时长
15 weeks
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