Journal of Low Temperature Physics

, Volume 191, Issue 3–4, pp 153–173 | Cite as

Morphological Simulation of Phase Separation Coupled Oscillation Shear and Varying Temperature Fields

  • Heping Wang
  • Xiaoguang Li
  • Kejun Lin
  • Xingguo Geng
Article
  • 31 Downloads

Abstract

This paper explores the effect of the shear frequency and Prandtl number (Pr) on the procedure and pattern formation of phase separation in symmetric and asymmetric systems. For the symmetric system, the periodic shear significantly prolongs the spinodal decomposition stage and enlarges the separated domain in domain growth stage. By adjusting the Pr and shear frequency, the number and orientation of separated steady layer structures can be controlled during domain stretch stage. The numerical results indicate that the increase in Pr and decrease in the shear frequency can significantly increase in the layer number of the lamellar structure, which relates to the decrease in domain size. Furthermore, the lamellar orientation parallel to the shear direction is altered into that perpendicular to the shear direction by further increasing the shear frequency, and also similar results for larger systems. For asymmetric system, the quantitative analysis shows that the decrease in the shear frequency enlarges the size of separated minority phases. These numerical results provide guidance for setting the optimum condition for the phase separation under periodic shear and slow cooling.

Keywords

Lattice Boltzmann method Phase separation Prandtl number Shear frequency 

Notes

Acknowledgements

We acknowledge the financial support from the National Nature Science Foundation of China (Grant Nos. 51301139, 11404243, 10872172 and 51672224), the Shaanxi Provincial Natural Science Foundation (Grant No. 2016JM1003), the Fundamental Research Funds for the Central Universities (Grant No. 3102016ZY026), Scientific Research Program Funded by Shaanxi Provincial Education Department (Program No. 15JK1313) and the Start-up Funding of Northwestern Polytechnical University (Grant No. G2016KY0306).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Heping Wang
    • 1
  • Xiaoguang Li
    • 1
  • Kejun Lin
    • 1
  • Xingguo Geng
    • 1
  1. 1.Functional Soft Matter and Materials Group, Key Laboratory of Space Applied Physics and Chemistry of Ministry of Education, School of ScienceNorthwestern Polytechnical UniversityXi’anChina

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