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A Convex-Splitting Scheme for a Diffuse Interface Model with Peng-Robinson Equation of State

Part of: Error analysis and interval analysis Partial differential equations, initial value and time-dependent initial-boundary value problems

Published online by Cambridge University Press:  11 July 2017

Qiujin Peng
Qiujin Peng*
Affiliation:
Institute for Mathematical Sciences, Renmin University of China, No. 59 Zhongguancun Street, Haidian District, Beijing 100872, China
*
*Corresponding author. Email:pengqiujin@ruc.edu.cn (Q. J. Peng)
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Abstract

We present a convex-splitting scheme for the fourth order parabolic equation derived from a diffuse interface model with Peng-Robinson equation of state for pure substance. The semi-implicit scheme is proven to be uniquely solvable, mass conservative, unconditionally energy stable and L∞ convergent with the order of . The numerical results verify the effectiveness of the proposed algorithm and also show good agreement of the numerical solution with laboratory experimental results.

Keywords

Diffuse interface modelfourth order parabolic equationconvex-splitting schemeconvergence

MSC classification

Secondary: 65M06: Finite difference methods 65M12: Stability and convergence of numerical methods 65G99: None of the above, but in this section
Type
Research Article
Information
Advances in Applied Mathematics and Mechanics , Volume 9 , Issue 5 , October 2017 , pp. 1162 - 1188
Copyright
Copyright © Global-Science Press 2017 

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