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Updated: Jun 26, 2025

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混合格子-博尔兹曼-有限差异方法用于模拟微相变材料泥在对流流动流中的模拟

Anas Ghannam¹, Eiyad Abu-Nada¹, Anas Alazzam¹

¹Mechanical Engineering Department, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates.

Physical review. E

|May 17, 2024

概括

本研究介绍了一种混合数值方法,将格子博尔茨曼方法 (LBM) 和有限差异方法 (FDM) 结合起来,用于建模微相变材料 (MPCM) 悬浮. 这种新的方法准确地模拟了微粒行为和微频道中的热传递.

科学领域:

计算流体动力学的流体动力学.
热传递热量转移的方法
多相流程多相流程

背景情况:

在迷你通道中模拟微相变材料 (MPCM) 悬浮,在模拟流体动力学和相变方面提出了挑战.
现有的方法往往需要复杂的处理相位接口和粘度变化.

研究的目的:

开发和验证一个混合数值方案,将格子博尔茨曼法 (LBM) 与有限差异法 (FDM) 结合起来.
准确地建模MPCM悬浮在迷你通道中的行为,包括粒子动力学和相变.
为了研究粒子密度和体积分数对传热特性的影响.

主要方法:

一种混合数值方案,在一次性电容假设下,将LBM用于流体动力学和FDM用于相变.
一个拉格朗的方案被用来跟踪MPCM粒子的运动.
该模型使用经典粒子案例进行了验证,并适应了变化的粘度.

主要成果:

混合型LBM-FDM模型成功实现了四向合,并适应了粘度变化而没有均化.
对MPCM粒子的近壁热相互作用进行了分析,以轻,中性浮动和密集的场景.
该研究提供了关于体积分数对传热系数和性能指数的影响的见解.

结论:

拟议的混合LBM-FDM方案为模拟MPCM悬挂提供了一个强大的和高效的方法.
这种方法简化了相变和粒子相互作用的处理.
这些发现有助于更好地了解MPCM悬浮的微通道中的热传递增强.

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