Mixing indices in up-scaled simulations

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-02-17 DOI:10.1016/j.powtec.2025.120775

Balázs Füvesi , Christoph Goniva , Stefan Luding , Vanessa Magnanimo

{"title":"Mixing indices in up-scaled simulations","authors":"Balázs Füvesi , Christoph Goniva , Stefan Luding , Vanessa Magnanimo","doi":"10.1016/j.powtec.2025.120775","DOIUrl":null,"url":null,"abstract":"<div><div>Mixing and segregation of granular materials are important industrial processes. Their accurate simulation via discrete simulations requires a large number of particles with high computational demand, which can make it infeasible for industrial scale applications. One way to solve this challenge is the usage of up-scaled simulations, where groups of small particles are replaced by larger particles, while the relevant features of the process are conserved.</div><div>In order to help improve the mixing evaluation, we review numerous mixing indices and investigate their sensitivity to factors relevant to up-scaled mixing process simulations. We test the indices in a simplified 2D model system. We focus on system-specific and statistical features.</div><div>As the main output, we provide guidelines for selecting appropriate indices and their parameters to analyse a given mixing process. We show that: (i) the average height method is simple to calculate and useful for evaluating mixing in different directions; (ii) the Lacey index performs well when the solid fraction is homogeneous; (iii) the neighbour distance method allows evaluation of mixing even without selecting a subset of particle types to trace.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120775"},"PeriodicalIF":4.5000,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032591025001706","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Mixing and segregation of granular materials are important industrial processes. Their accurate simulation via discrete simulations requires a large number of particles with high computational demand, which can make it infeasible for industrial scale applications. One way to solve this challenge is the usage of up-scaled simulations, where groups of small particles are replaced by larger particles, while the relevant features of the process are conserved.

In order to help improve the mixing evaluation, we review numerous mixing indices and investigate their sensitivity to factors relevant to up-scaled mixing process simulations. We test the indices in a simplified 2D model system. We focus on system-specific and statistical features.

As the main output, we provide guidelines for selecting appropriate indices and their parameters to analyse a given mixing process. We show that: (i) the average height method is simple to calculate and useful for evaluating mixing in different directions; (ii) the Lacey index performs well when the solid fraction is homogeneous; (iii) the neighbour distance method allows evaluation of mixing even without selecting a subset of particle types to trace.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

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.