A moment-of-fluid method for resolving filamentary structures using a symmetric multi-material approach

A moment-of-fluid method for resolving filamentary structures using a symmetric multi-material approach
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使用对称多材料方法解析丝状结构的流体矩方法

DOI:
10.1016/j.jcp.2023.112401
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发表时间:
2023
影响因子:
4.1
通讯作者:
Hergibo P
Hergibo P
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hergibo P

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多相流在工程的许多领域都有影响。流体力矩(MOF)方法是一种同时利用细胞内体积分数和质心进行界面重建的界面捕捉方法。提出了一种重建薄壁结构的对称方法。也被称为细丝,这些亚细胞特征涉及多材料重建。此外,在不需要任何初始条件的情况下,利用二分法给出了一种新的优化算法。对于动态情况,使用拉格朗日方法,对时间步长没有限制。使用文献中广泛研究的几个基准案例对新方法进行了验证。在保持可接受的运行时间的同时,实现了接近二次的收敛和高精度。
Multiphase flows have implications in many areas of engineering. The moment-of-fluid (MOF) method is an interface capturing method using both volume fraction and centroid within a cell for interface reconstruction. A symmetric approach to reconstruct thin structures is presented. Also called filaments, these subcell characteristics involve multi-material reconstruction. In addition, a new optimisation algorithm is presented using a bisection method without any necessary initial condition. Using a Lagrangian approach for dynamic cases, no restrictions are imposed on timestep. The new method is validated using several benchmark cases that have been studied extensively in the literature. A near quadratic order of convergence and high accuracy is achieved while maintaining an acceptable runtime.
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