Pattern study of thermal phase separation for binary fluid mixtures
Pattern study of thermal phase separation for binary fluid mixtures
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DOI：
10.1108/09615531111135837
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发表时间：
2011-06
影响因子：
4.2
通讯作者：
A. Tiribocchi;A. Piscitelli;G. Gonnella;A. Lamura
中科院分区：
文献类型：
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作者：
A. Tiribocchi;A. Piscitelli;G. Gonnella;A. Lamura
目的-本文的目的是提出数值计算结果的二元流体混合物淬火通过接触冷walls.Design/方法/approach的相分离-热相分离模拟使用混合格子玻尔兹曼方法，解决了连续性和Navier-Stokes方程。能量和浓度的方程通过使用有限差分格式求解。这种方法提供了一个完整的描述中的混合物的热流体动力学效应。结果-丰富多样的域模式被发现取决于粘度和混合物的导热性。有序的层状结构，观察到在高粘度，而域圆形的形状占主导地位的相分离在低粘度，其中两个尺度表征域的增长。研究限制/影响-本方法提供了一种数值方法，可以扩展到其他系统，如液体-蒸汽或层状系统。此外，三维...
Purpose – The purpose of this paper is to present numerical results about phase separation of binary fluid mixtures quenched by contact with cold walls.Design/methodology/approach – The thermal phase separation is simulated by using a hybrid lattice Boltzmann method that solves the continuity and the Navier‐Stokes equations. The equations for energy and concentration are solved by using a finite‐difference scheme. This approach provides a complete description of the thermo‐hydrodynamic effects in the mixture.Findings – A rich variety of domain patterns are found depending on the viscosity and on the heat conductivity of the mixture. Ordered lamellar structures are observed at high viscosity while domains rounded in shape dominate the phase separation at low viscosity, where two scales characterize the growth of domains.Research limitations/implications – The present approach provides a numerical method that can be extended to other systems such as liquid‐vapor or lamellar systems. Moreover, a three‐dimens...