A mathematical recursive model for accurate description of the phase behavior in the near-critical region by Generalized van der Waals Equation

3rd International Conference on Mathematical Modeling in Physical Sciences

物理学;数学

Kim, Jibeom^1 ; Jeon, Joonhyeon^1

Department of Fusion Energy and Advanced Material Engineering, Dongguk University-Seoul, 26, 3-ga, Pil-dong, Jung-gu, Seoul

100-715, Korea, Republic of^1

关键词: Accurate prediction;    Calculating model;    Comparison result;    Equation of state;    Performance evaluations;    Physical significance;    Recursive modeling;    Van der Waals equation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/574/1/012006/pdf
DOI  :  10.1088/1742-6596/574/1/012006

来源: IOP

【 摘 要 】

Recently, related studies on Equation Of State (EOS) have reported that generalized van der Waals (GvdW) shows poor representations in the near critical region for non-polar and non-sphere molecules. Hence, there are still remains a problem of GvdW parameters to minimize loss in describing saturated vapor densities and vice versa. This paper describes a recursive model GvdW (rGvdW) for an accurate representation of pure fluid materials in the near critical region. For the performance evaluation of rGvdW in the near critical region, other EOS models are also applied together with two pure molecule group: alkane and amine. The comparison results show rGvdW provides much more accurate and reliable predictions of pressure than the others. The calculating model of EOS through this approach gives an additional insight into the physical significance of accurate prediction of pressure in the nearcritical region.