Numerical study of dense powder flow in a rotating drum: Comparison of CFD to experimental measurements

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL Powder Technology Pub Date : 2024-06-07 DOI:10.1016/j.powtec.2024.119981

Lucas Chatre , Xavier Lemerle , Marc Bataille , Florian Herbelet , Marie Debacq , Jeremy Nos , Khashayar Saleh , Mikel Leturia , Tojonirina Randriamanantena

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Abstract

Designing chemical reactor equipment requires a thorough understanding of powder flow. Solid rheology modelling offers various models for this purpose. A comparative study of two different CFD models, the Kinetic Theory of Granular Flow (KTGF) and the dense granular flow ( $μ (I)$ law), is proposed. Both models were confronted with experimental results obtained on a rotating drum for different rotation speeds and powder flowabilities. Image processing was used to compare the experimental gas/solid interfaces with those obtained from CFD. The KTGF model did not represent the powder rheology at low rotation speeds, regardless of the powder, whereas it was closer to experiments at higher speeds. The dense granular flow model was more appropriate for this system as it described the powder shape inside a rotating drum relatively well for each experiment. The latter model is recommended for modelling dense granular flows, while the KTGF is better suited to gas-solid flows.

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旋转滚筒中致密粉末流动的数值研究：CFD 与实验测量结果的比较

设计化学反应设备需要对粉末流动有透彻的了解。固体流变建模为此提供了各种模型。本文对两种不同的 CFD 模型，即颗粒流动动力学理论（KTGF）和致密颗粒流动（μI 法）进行了比较研究。这两种模型都与在不同转速和粉末流动性的旋转滚筒上获得的实验结果进行了对比。利用图像处理技术将实验中的气体/固体界面与 CFD 得出的界面进行了比较。KTGF 模型在低转速下不能代表粉末流变，不管粉末是什么，而在高转速下则更接近实验结果。致密粒状流模型更适合该系统，因为它在每次实验中都能较好地描述旋转滚筒内的粉末形状。建议使用后一种模型来模拟致密颗粒流动，而 KTGF 更适合气固流动。

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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.

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