Coupling effect between mixing uniformity and heat transfer of particles in a double barrel with differential velocity based on CFD-DEM

IF 3.4 3区工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

Computational Particle Mechanics Pub Date : 2025-04-23 DOI:10.1007/s40571-025-00957-6

Lingying Zhao, Min Ye, Jinning Zhi, Yafeng Ren, Hairong Gu

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Abstract

The coupling effect between mixing uniformity and heat transfer of particles in the double barrel with differential velocity (DBDV) was studied. The particle motion model, heat transfer model and their coupled processes were established. The velocity and temperature fields of particles and fluids and the coupling relationship were analyzed. The results indicate that the particle flow direction in the mixing zone is opposite to the fluid flow direction. The velocity and temperature of the fluid are low where particles exist. The velocity and temperature of the fluid closer to the outlet are higher in the mixing zone. The dispersion coefficient decreases with increasing temperature at low and high linear velocities. The dispersion coefficient generally increases with the increase of temperature at medium linear velocity. It is advisable to choose the medium linear velocity to obtain particles with high uniformity and high temperature. This provides theoretical guidance for the development of DBDV.

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基于CFD-DEM的差速双筒内颗粒混合均匀性与传热耦合效应

研究了差速双筒内混合均匀性与颗粒传热之间的耦合效应。建立了颗粒运动模型、传热模型及其耦合过程。分析了颗粒和流体的速度场和温度场及其耦合关系。结果表明：混合区内颗粒流动方向与流体流动方向相反；在有颗粒存在的地方，流体的速度和温度都很低。靠近出口的流体的速度和温度在混合区较高。在低线速度和高线速度下，色散系数随温度的升高而减小。在中等线速度下，色散系数一般随温度的升高而增大。为获得均匀度高、温度高的颗粒，宜选择中等线速度。这为DBDV的发展提供了理论指导。

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

Computational Particle Mechanics Mathematics-Computational Mathematics

CiteScore

5.70

自引率

9.10%

发文量

期刊介绍： GENERAL OBJECTIVES: Computational Particle Mechanics (CPM) is a quarterly journal with the goal of publishing full-length original articles addressing the modeling and simulation of systems involving particles and particle methods. The goal is to enhance communication among researchers in the applied sciences who use "particles'''' in one form or another in their research. SPECIFIC OBJECTIVES: Particle-based materials and numerical methods have become wide-spread in the natural and applied sciences, engineering, biology. The term "particle methods/mechanics'''' has now come to imply several different things to researchers in the 21st century, including: (a) Particles as a physical unit in granular media, particulate ﬂows, plasmas, swarms, etc., (b) Particles representing material phases in continua at the meso-, micro-and nano-scale and (c) Particles as a discretization unit in continua and discontinua in numerical methods such as Discrete Element Methods (DEM), Particle Finite Element Methods (PFEM), Molecular Dynamics (MD), and Smoothed Particle Hydrodynamics (SPH), to name a few.