{"title":"Heat and mass transfer characteristics of granular materials under shear actions","authors":"Xi Long Zhou, Xiang Jun Liu","doi":"10.1016/j.ijheatmasstransfer.2025.127039","DOIUrl":null,"url":null,"abstract":"<div><div>The heat and mass transfer characteristics of granular flow are of great significance for the design and operation of various industrial applications for treating granular materials. This paper aims to reveal the laws of granular diffusivity and effective thermal conductivity (ETC) of granular flow under different shear actions. Discrete element method simulations of granular shear flow, mass and heat transfer process are conducted. The detailed behaviors of particle motion, diffusion, as well as heat transfer under different shear actions are investigated. Expressions of volume fraction and granular diffusivity with inertial number are proposed. Two different mechanisms of contact heat conduction and fluctuation heat transfer are distinguished based on the analysis of granular flow and diffusion characteristics. Expressions of contact thermal conductivity and apparent fluctuation conductivity with inertial number are proposed. Moreover, an analogy analysis of the apparent thermal diffusivity to mass diffusivity is conducted, and the ratio is 0.5934 in this study.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"246 ","pages":"Article 127039"},"PeriodicalIF":5.8000,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Heat and Mass Transfer","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0017931025003801","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The heat and mass transfer characteristics of granular flow are of great significance for the design and operation of various industrial applications for treating granular materials. This paper aims to reveal the laws of granular diffusivity and effective thermal conductivity (ETC) of granular flow under different shear actions. Discrete element method simulations of granular shear flow, mass and heat transfer process are conducted. The detailed behaviors of particle motion, diffusion, as well as heat transfer under different shear actions are investigated. Expressions of volume fraction and granular diffusivity with inertial number are proposed. Two different mechanisms of contact heat conduction and fluctuation heat transfer are distinguished based on the analysis of granular flow and diffusion characteristics. Expressions of contact thermal conductivity and apparent fluctuation conductivity with inertial number are proposed. Moreover, an analogy analysis of the apparent thermal diffusivity to mass diffusivity is conducted, and the ratio is 0.5934 in this study.
期刊介绍：
International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems.
Topics include:
-New methods of measuring and/or correlating transport-property data
-Energy engineering
-Environmental applications of heat and/or mass transfer
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