Volume 15, Issue 12 (2016)                   Modares Mechanical Engineering 2016, 15(12): 376-386 | Back to browse issues page

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Khatoonabadi S M, Ashrafizadeh M. Comparison and Development of multi-phase Pseudo-potential model for various equations of state. Modares Mechanical Engineering. 2016; 15 (12) :376-386
URL: http://journals.modares.ac.ir/article-15-734-en.html
Abstract:   (2332 Views)
Numerous models have been proposed to incorporate various equations of state (EOS) into the pseudo potential model. This paper presents an investigation of different EOS types based on the Gong and Cheng model in multiphase-single component flows by the lattice Boltzmann method. Primarily, it is conducted to investigate eight EOS’s classified in four categories; the Shan- Chen EOS, the cubic EOS, the non-cubic EOS, and the cubic and non-cubic combination EOS. The results show that each EOS type results in producing relatively similar spurious currents and has a maximum achievable density ratio. Although by choosing a proper beta parameter for every EOS the simulation errors decrease dramatically, our results show it is impossible to set a constant parameter for the non-cubic EOS. Therefore, a new equation is introduced to predict an efficient beta for the cubic and the Shan- Chen EOS’s. It is also found that the non-cubic, cubic, and non-cubic and cubic combination EOS’s have a wider temperature range and larger density ratios respectively. Hence, we determine a temperature dependent function for the beta parameter prediction instead of using a fixed value for the non-cubic EOS. The results are noticeably in better agreement with those of the Maxwell construction (theoretical results).
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Article Type: Research Article | Subject: Lattice-Boltzmann Method
Received: 2015/08/10 | Accepted: 2015/10/30 | Published: 2015/12/5

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