Study on Pressure-based Numerical Simulation Algorithm of Hydraulic Slug
A pressure-based algorithm is proposed to simulate the initialization and development process of hydraulic slug.Firstly,the algorithm combines the two-fluid model and the appropriate closed relationship to construct a mathematical model suitable for hydraulic slugs.Secondly,in order to solve the singular problem of the equations caused by the absence of gas in the slug head,a pressure-based solution algorithm that can simultaneously deal with the coupling of the single-phase and two-phase between the slug body and the liquid film region is proposed.The results show that the algorithm can automatically initialize the hydraulic slug and simulate the conversion process of stratified flow to hydraulic slug flow,which is consistent with the common flow pattern conversion diagram.At the same time,the slug frequency and length are random,and the statistics are consistent with the empirical relationship.
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维普
