Comparison of Three-Dimensional Multidomain and Single-Domain Models for the Horizontal Solidification Problem
Comparison of Three-Dimensional Multidomain and Single-Domain Models for the Horizontal Solidification Problem
复制标题
水平凝固问题三维多域和单域模型的比较
DOI：
10.1115/1.4033700
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发表时间：
2016
影响因子：
--
通讯作者：
A. Azulay
中科院分区：
文献类型：
--
作者：
M. H. Avnaim;A. Levy;B. Mikhailovich;O. Ben;A. Azulay
本文对矩形腔内镓的水平凝固进行了实验和数值研究。建立了与不同数值方法相关的两个三维（3D）数值模型。第一个是基于流体体积（VOF）方法的单域（SD）模型。该模型还考虑了糊状区域的存在。第二个模型是多域（MD）模型；它包括两个不同的网格用于两个阶段，并使用 Stephan 边界条件来确定前沿速度。 3D 模型在各种热边界条件下进行了测试，并与在适当的实验装置中获得的实验结果进行了比较。实验装置包括超声波多普勒测速仪 (UDV)，用于无创测量金属液体部分的速度、液固界面位置和轮廓、位移和纵向平均速度。为了确定边界影响，建立了 3D 和 2D 模型。对凝固前沿位置和形状以及速度场和温度场进行了比较。一般来说，就实验结果而言，3D 数值模型比 2D 模型给出了更准确的结果。尽管 MD 模型的构建比 VOF 模型更复杂并且需要更多的计算工作，但与当前实验相比，3D MD 模型提供了最准确的结果。
In this paper, horizontal solidification of gallium in a rectangular cavity was studied both experimentally and numerically. Two three-dimensional (3D) numerical models related to different numerical approaches were built. The first is a single-domain (SD) model based on the volume-of-fluid (VOF) method. This model also takes into account the presence of a mushy zone. The second model is a multidomain (MD) one; it includes two different meshes for the two phases and uses Stephan's boundary condition to determine the front velocity. The 3D models were tested under various thermal boundary conditions and compared with experimental results obtained in an appropriate experimental setup. The experimental setup included an ultrasonic Doppler velocimeter (UDV) for noninvasive measurements of the velocities in the liquid part of the metal, liquid–solid interface position and profile, its displacement, and longitudinal mean velocity. For determining the boundary influence, both 3D and 2D models were built. The comparison was carried out for the solidification front location and shape and the velocity and temperature fields. In general, the 3D numerical model gave more accurate results than the 2D model with respect to the experiments results. Although the MD model is more complicated to build and requires more computational efforts than the VOF model, the 3D MD model provides the most accurate results in comparison with current experiments.
DOI：
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发表时间：
2006
期刊：
Proceedings of the 5^<th> Int. Symposium on Ultrasonic Doppler Method for Fluid Mechanics and Fluid engineering 5
影响因子：
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作者：
Y.Tasaka;M.Yoshida;Y.Takeda;T.Yanagisawa
通讯作者：
T.Yanagisawa