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dc.contributor.authorLi, Jingfa
dc.contributor.authorZhang, Tao
dc.contributor.authorSun, Shuyu
dc.contributor.authorYu, Bo
dc.date.accessioned2019-08-22T11:27:51Z
dc.date.available2019-08-22T11:27:51Z
dc.date.issued2019-07-19
dc.identifier.citationLi, J., Zhang, T., Sun, S., & Yu, B. (2019). Numerical investigation of the POD reduced-order model for fast predictions of two-phase flows in porous media. International Journal of Numerical Methods for Heat & Fluid Flow, ahead-of-print(ahead-of-print). doi:10.1108/hff-02-2019-0129
dc.identifier.doi10.1108/HFF-02-2019-0129
dc.identifier.urihttp://hdl.handle.net/10754/656582
dc.description.abstractPurpose: This paper aims to present an efficient IMPES algorithm based on a global model order reduction method, proper orthogonal decomposition (POD), to achieve the fast solution and prediction of two-phase flows in porous media. Design/methodology/approach: The key point of the proposed algorithm is to establish an accurate POD reduced-order model (ROM) for two-phase porous flows. To this end, two projection methods including projecting the original governing equations (Method I) and projecting the discrete form of original governing equations (Method II) are respectively applied to construct the POD-ROM, and their distinctions are compared and analyzed in detail. It is found the POD-ROM established by Method I is inapplicable to multiphase porous flows due to its failed introduction of fluid saturation and permeability that locate on the edge of grid cell, which would lead to unphysical results. Findings: By using Method II, an efficient IMPES algorithm that can substantially speed up the simulation of two-phase porous flows is developed based on the POD-ROM. The computational efficiency and numerical accuracy of the proposed algorithm are validated through three numerical examples, and simulation results illustrate that the proposed algorithm displays satisfactory computational speed-up (one to two orders of magnitude) without sacrificing numerical accuracy obviously when comparing to the standard IMPES algorithm that without any acceleration technique. In addition, the determination of POD modes number, the relative errors of wetting phase pressure and saturation, and the influence of POD modes number on the overall performances of the proposed algorithm, are investigated. Originality/value: 1. Two projection methods are applied to establish the POD-ROM for two-phase porous flows and their distinctions are analyzed. The reason why POD-ROM is difficult to be applied to multiphase porous flows is clarified firstly in this study. 2. A highly efficient IMPES algorithm based on the POD-ROM is proposed to accelerate the simulation of two-phase porous flows. 3. Satisfactory computational speed-up (one to two orders of magnitude) and prediction accuracy of the proposed algorithm are observed under different conditions.
dc.publisherEmerald
dc.relation.urlhttps://www.emeraldinsight.com/doi/10.1108/HFF-02-2019-0129
dc.rightsArchived with thanks to International Journal of Numerical Methods for Heat and Fluid Flow
dc.subjectPorous media
dc.subjectNumerical methods
dc.subjectTwo-phase flow
dc.subjectPOD-ROM
dc.subjectIMPES algorithm
dc.titleNumerical investigation of the POD reduced-order model for fast predictions of two-phase flows in porous media
dc.typeArticle
dc.contributor.departmentComputational Transport Phenomena Lab
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalInternational Journal of Numerical Methods for Heat and Fluid Flow
dc.eprint.versionPost-print
dc.contributor.institutionBeijing Institute of Petrochemical Technology, Beijing, China
kaust.personLi, Jingfa
kaust.personZhang, Tao
kaust.personSun, Shuyu
refterms.dateFOA2019-08-22T12:55:59Z
dc.date.published-online2019-07-19
dc.date.published-print2019-07-11


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