Criteria for integro-differential modeling of plane-parallel flow of viscous incompressible fluid
For a liquid with a nonmonotonic flow curve in the stationary case in the region of the descending branch, setting the velocity at the boundary does not uniquely determine the shear stress, strain rate distribution, and velocity profile that arise since the problem is known to have many unstable sol...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/38/e3sconf_conmechydro23_02018.pdf |
| _version_ | 1797775902371741696 |
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| author | Abdullaev A. A. Safarbayeva N. M. Kholkhodjaev B. |
| author_facet | Abdullaev A. A. Safarbayeva N. M. Kholkhodjaev B. |
| author_sort | Abdullaev A. A. |
| collection | DOAJ |
| description | For a liquid with a nonmonotonic flow curve in the stationary case in the region of the descending branch, setting the velocity at the boundary does not uniquely determine the shear stress, strain rate distribution, and velocity profile that arise since the problem is known to have many unstable solutions. At the same time, the problem of the motion of such fluid under the action of a given pressure difference has no more than three solutions, two of which are stable, and the third is unstable and not reproducible. Which of the two stable solutions is realized depends on the loading history. The problem of determining the velocity profile for a fluid characterized by a nonmonotonic rheological flow curve between parallel planes is considered. The existence of a solution is realized by reducing the problem posed to a singular integral equation of normal type, which is known by the Carleman – Vekua regularization method developed by S.G. Mikhlin and M.M. Smirnov equivalently reduces to the Fredholm integral equation of the second kind, and the solvability of the latter follows from the uniqueness of the solution delivered problem describing of criteria for integro–differential modeling of a plane-parallel flow of a viscous incompressible fluid. |
| first_indexed | 2024-03-12T22:42:18Z |
| format | Article |
| id | doaj.art-7992b06bf955492fa09d8d2ceff8d4fd |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-03-12T22:42:18Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-7992b06bf955492fa09d8d2ceff8d4fd2023-07-21T09:34:23ZengEDP SciencesE3S Web of Conferences2267-12422023-01-014010201810.1051/e3sconf/202340102018e3sconf_conmechydro23_02018Criteria for integro-differential modeling of plane-parallel flow of viscous incompressible fluidAbdullaev A. A.0Safarbayeva N. M.1Kholkhodjaev B.2“Tashkent Institute of Irrigation and Agricultural Mechanization Engineers” National Research University“Tashkent Institute of Irrigation and Agricultural Mechanization Engineers” National Research UniversityTashkent State Technical University UniversityFor a liquid with a nonmonotonic flow curve in the stationary case in the region of the descending branch, setting the velocity at the boundary does not uniquely determine the shear stress, strain rate distribution, and velocity profile that arise since the problem is known to have many unstable solutions. At the same time, the problem of the motion of such fluid under the action of a given pressure difference has no more than three solutions, two of which are stable, and the third is unstable and not reproducible. Which of the two stable solutions is realized depends on the loading history. The problem of determining the velocity profile for a fluid characterized by a nonmonotonic rheological flow curve between parallel planes is considered. The existence of a solution is realized by reducing the problem posed to a singular integral equation of normal type, which is known by the Carleman – Vekua regularization method developed by S.G. Mikhlin and M.M. Smirnov equivalently reduces to the Fredholm integral equation of the second kind, and the solvability of the latter follows from the uniqueness of the solution delivered problem describing of criteria for integro–differential modeling of a plane-parallel flow of a viscous incompressible fluid.https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/38/e3sconf_conmechydro23_02018.pdf |
| spellingShingle | Abdullaev A. A. Safarbayeva N. M. Kholkhodjaev B. Criteria for integro-differential modeling of plane-parallel flow of viscous incompressible fluid E3S Web of Conferences |
| title | Criteria for integro-differential modeling of plane-parallel flow of viscous incompressible fluid |
| title_full | Criteria for integro-differential modeling of plane-parallel flow of viscous incompressible fluid |
| title_fullStr | Criteria for integro-differential modeling of plane-parallel flow of viscous incompressible fluid |
| title_full_unstemmed | Criteria for integro-differential modeling of plane-parallel flow of viscous incompressible fluid |
| title_short | Criteria for integro-differential modeling of plane-parallel flow of viscous incompressible fluid |
| title_sort | criteria for integro differential modeling of plane parallel flow of viscous incompressible fluid |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/38/e3sconf_conmechydro23_02018.pdf |
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