Coupling of volume of fluid and level set methods in condensing heat transfer simulations
Coupling of volume of fluid and level set methods in condensing heat transfer simulations
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DOI：
10.1080/10618562.2019.1693546
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发表时间：
2020-01
影响因子：
1.3
通讯作者：
R. Kahraman;D. Bacheva;A. Schmieder;G. Tabor
中科院分区：
文献类型：
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作者：
R. Kahraman;D. Bacheva;A. Schmieder;G. Tabor
摘要添加剂制造(AM)是一种快速发展的新技术，它可以制造任意复杂的几何形状，并可能改变换热器的设计。为了推动这一转变，我们需要开发计算机模拟技术，以模拟任意复杂领域中的流体流动、热交换和相变，例如可以使用AM制造本工作旨在开发一个计算流体动力学(CFD)模型，用于计算传热和相变，该模型足够健壮，足以模拟汽车燃料电池应用的紧凑型AM换热器。采用流体体积法(VOF)和Level Set相结合的方法对两相流的流体动力学进行了模拟，以捕捉层流膜冷凝过程中液汽界面的尖锐变化。以Stefan问题为例，说明了LS-VOF方法对界面跟踪的改进。所得到的完全凝结模型首次应用于复杂的AM几何形状，并与实验数据进行了验证。
ABSTRACT Additive Manufacturing (AM) is a rapidly developing new technology which allows the manufacture of arbitrarily complex geometries, and which is likely to transform heat exchanger design. To drive this transformation we need to develop computer modelling techniques to model fluid flow, heat exchange and phase change in arbitrarily complex domains, such as can be manufactured using AM. The present work aims to develop a computational fluid dynamics (CFD) model for heat transfer and phase change, robust enough to model compact AM heat exchangers for automotive fuel cell application. The hydrodynamics of the two-phase flow is captured via the Volume Of Fluid (VOF) approach, coupled with a Level Set method in order to capture the sharp interface between liquid and vapour in laminar film condensation. The Stefan problem is used to show the improvement of the interface tracking with LS-VOF against VOF approach. The resulting complete condensation model is applied for the first time for a complex AM geometry and validated against experimental data.