Comparative study of different formulations and solution methods for two phase flow in saturated porous media.
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| Title: | Comparative study of different formulations and solution methods for two phase flow in saturated porous media. |
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| Authors: | Mathew, Mini1, Kumar, M. S. Mohan2 msmk@civil.iisc.ernet.in |
| Source: | Water Science & Technology. 2010, Vol. 62 Issue 11, p2678-2693. 16p. |
| Subjects: | Comparative studies, Computer simulation, Porous materials, Surface chemistry, Simulation methods & models |
| Abstract: | Six models (Simulators) are formulated and developed with all possible combinations of pressure and saturation of the phases as primary variables. A comparative study between six simulators with two numerical methods, conventional simultaneous and modified sequential methods are carried out. The results of the numerical models are compared with the laboratory experimental results to study the accuracy of the model especially in heterogeneous porous media. From the study it is observed that the simulator using pressure and saturation of the wetting fluid (PW, SW formulation) is the best among the models tested. Many simulators with nonwetting phase as one of the primary variables did not converge when used along with simultaneous method. Based on simulator 1 (PW, SW formulation), a comparison of different solution methods such as simultaneous method, modified sequential and adaptive solution modified sequential method are carried out on 4 test problems including heterogeneous and randomly heterogeneous problems. It is found that the modified sequential and adaptive solution modified sequential methods could save the memory by half and as also the CPU time required by these methods is very less when compared with that using simultaneous method. It is also found that the simulator with PNW and PW as the primary variable which had problem of convergence using the simultaneous method, converged using both the modified sequential method and also using adaptive solution modified sequential method. The present study indicates that pressure and saturation formulation along with adaptive solution modified sequential method is the best among the different simulators and methods tested. [ABSTRACT FROM AUTHOR] |
| Copyright of Water Science & Technology is the property of IWA Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 59511894 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Comparative study of different formulations and solution methods for two phase flow in saturated porous media. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Mathew%2C+Mini%22">Mathew, Mini</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kumar%2C+M%2E+S%2E+Mohan%22">Kumar, M. S. Mohan</searchLink><relatesTo>2</relatesTo><i> msmk@civil.iisc.ernet.in</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Water+Science+%26+Technology%22">Water Science & Technology</searchLink>. 2010, Vol. 62 Issue 11, p2678-2693. 16p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Comparative+studies%22">Comparative studies</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Porous+materials%22">Porous materials</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+chemistry%22">Surface chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Simulation+methods+%26+models%22">Simulation methods & models</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Six models (Simulators) are formulated and developed with all possible combinations of pressure and saturation of the phases as primary variables. A comparative study between six simulators with two numerical methods, conventional simultaneous and modified sequential methods are carried out. The results of the numerical models are compared with the laboratory experimental results to study the accuracy of the model especially in heterogeneous porous media. From the study it is observed that the simulator using pressure and saturation of the wetting fluid (PW, SW formulation) is the best among the models tested. Many simulators with nonwetting phase as one of the primary variables did not converge when used along with simultaneous method. Based on simulator 1 (PW, SW formulation), a comparison of different solution methods such as simultaneous method, modified sequential and adaptive solution modified sequential method are carried out on 4 test problems including heterogeneous and randomly heterogeneous problems. It is found that the modified sequential and adaptive solution modified sequential methods could save the memory by half and as also the CPU time required by these methods is very less when compared with that using simultaneous method. It is also found that the simulator with PNW and PW as the primary variable which had problem of convergence using the simultaneous method, converged using both the modified sequential method and also using adaptive solution modified sequential method. The present study indicates that pressure and saturation formulation along with adaptive solution modified sequential method is the best among the different simulators and methods tested. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Water Science & Technology is the property of IWA Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.2166/wst.2010.309 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: 2678 Subjects: – SubjectFull: Comparative studies Type: general – SubjectFull: Computer simulation Type: general – SubjectFull: Porous materials Type: general – SubjectFull: Surface chemistry Type: general – SubjectFull: Simulation methods & models Type: general Titles: – TitleFull: Comparative study of different formulations and solution methods for two phase flow in saturated porous media. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Mathew, Mini – PersonEntity: Name: NameFull: Kumar, M. S. Mohan IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: 2010 Type: published Y: 2010 Identifiers: – Type: issn-print Value: 02731223 Numbering: – Type: volume Value: 62 – Type: issue Value: 11 Titles: – TitleFull: Water Science & Technology Type: main |
| ResultId | 1 |
