Comparative evaluation of DES and SAS turbulence models for incompressible flow in a Venturi tube
Computational fluid dynamics employs the Large Eddy Simulation (LES) and Reynolds-averaged Navier-Stokes (RANS) models and combines both models to perform a hybrid RANS/LES simulation of the transient state flow field, within which there are the Detached Eddy Simulation (DES) and Scale-Adaptive Simu...
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| Format: | Article |
| Language: | English |
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National Institute for Aerospace Research “Elie Carafoli” - INCAS
2022-06-01
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| Series: | INCAS Bulletin |
| Subjects: | |
| Online Access: | https://bulletin.incas.ro/files/tolentino_gonzalez_mirez__vol_14_iss_2.pdf |
| _version_ | 1818212141719617536 |
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| author | San Luis TOLENTINO Omar GONZÁLEZ Jorge MÍREZ |
| author_facet | San Luis TOLENTINO Omar GONZÁLEZ Jorge MÍREZ |
| author_sort | San Luis TOLENTINO |
| collection | DOAJ |
| description | Computational fluid dynamics employs the Large Eddy Simulation (LES) and Reynolds-averaged Navier-Stokes (RANS) models and combines both models to perform a hybrid RANS/LES simulation of the transient state flow field, within which there are the Detached Eddy Simulation (DES) and Scale-Adaptive Simulation (SAS) models. In the present work, the objective is to evaluate the DES and SAS turbulence models for flow (water) in a Venturi tube, for 2D computational domains. The domain was discretized for grids with quadrilateral cells, and the flow field was studied for four flow rates. The results of the pressure flow field simulations for the DES and SAS models were compared with experimental data reported in the literature, which fit the experiments. However, the DES k-ε model presented a negative pressure drop for a region of the flow adjacent to the wall, at the entrance of the throat section, the other models DES S-A, DES SST k-ω and SAS presented positive pressures. The discharge coefficients yielded values in the range of 0.94-0.951, which were lower than the experiments, for errors in the range of 1.57-2.76%. |
| first_indexed | 2024-12-12T05:43:41Z |
| format | Article |
| id | doaj.art-d78b1ae947fb42f2ba11a51572808d4d |
| institution | Directory Open Access Journal |
| issn | 2066-8201 2247-4528 |
| language | English |
| last_indexed | 2024-12-12T05:43:41Z |
| publishDate | 2022-06-01 |
| publisher | National Institute for Aerospace Research “Elie Carafoli” - INCAS |
| record_format | Article |
| series | INCAS Bulletin |
| spelling | doaj.art-d78b1ae947fb42f2ba11a51572808d4d2022-12-22T00:35:51ZengNational Institute for Aerospace Research “Elie Carafoli” - INCASINCAS Bulletin2066-82012247-45282022-06-011428710110.13111/2066-8201.2022.14.2.8Comparative evaluation of DES and SAS turbulence models for incompressible flow in a Venturi tubeSan Luis TOLENTINO0Omar GONZÁLEZ1Jorge MÍREZ2National Experimental Polytechnic University “AJS” Vice-Rectorate, Puerto Ordaz (UNEXPO), Bolívar, Venezuela, sanluist@gmail.comFaculty of Civil Engineering, National University Hermilio Valdizán (UNHEVAL), Huánuco, Perú, omargc17@gmail.comGroup of Mathematical Modeling and Numerical Simulation (GMMNS), Faculty of Oil, Natural Gas and Petrochemical Engineering, Universidad Nacional de Ingeniería (UNI), Lima, Perú, jmirez@uni.edu.peComputational fluid dynamics employs the Large Eddy Simulation (LES) and Reynolds-averaged Navier-Stokes (RANS) models and combines both models to perform a hybrid RANS/LES simulation of the transient state flow field, within which there are the Detached Eddy Simulation (DES) and Scale-Adaptive Simulation (SAS) models. In the present work, the objective is to evaluate the DES and SAS turbulence models for flow (water) in a Venturi tube, for 2D computational domains. The domain was discretized for grids with quadrilateral cells, and the flow field was studied for four flow rates. The results of the pressure flow field simulations for the DES and SAS models were compared with experimental data reported in the literature, which fit the experiments. However, the DES k-ε model presented a negative pressure drop for a region of the flow adjacent to the wall, at the entrance of the throat section, the other models DES S-A, DES SST k-ω and SAS presented positive pressures. The discharge coefficients yielded values in the range of 0.94-0.951, which were lower than the experiments, for errors in the range of 1.57-2.76%.https://bulletin.incas.ro/files/tolentino_gonzalez_mirez__vol_14_iss_2.pdfdischarge coefficientincompressible flowdes and sas modelspressurerans/les hybrid simulationventuri tube |
| spellingShingle | San Luis TOLENTINO Omar GONZÁLEZ Jorge MÍREZ Comparative evaluation of DES and SAS turbulence models for incompressible flow in a Venturi tube INCAS Bulletin discharge coefficient incompressible flow des and sas models pressure rans/les hybrid simulation venturi tube |
| title | Comparative evaluation of DES and SAS turbulence models for incompressible flow in a Venturi tube |
| title_full | Comparative evaluation of DES and SAS turbulence models for incompressible flow in a Venturi tube |
| title_fullStr | Comparative evaluation of DES and SAS turbulence models for incompressible flow in a Venturi tube |
| title_full_unstemmed | Comparative evaluation of DES and SAS turbulence models for incompressible flow in a Venturi tube |
| title_short | Comparative evaluation of DES and SAS turbulence models for incompressible flow in a Venturi tube |
| title_sort | comparative evaluation of des and sas turbulence models for incompressible flow in a venturi tube |
| topic | discharge coefficient incompressible flow des and sas models pressure rans/les hybrid simulation venturi tube |
| url | https://bulletin.incas.ro/files/tolentino_gonzalez_mirez__vol_14_iss_2.pdf |
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