ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATION
ABSTRACT The performances of the Standard κ-ε, RNG, Realizable, κ-ω and RSM turbulence models to describe the behavior of the flow in agitated tank reactors were evaluated. Because most of these tanks have complex geometries, structured meshing schemes are not a practical alternative in engineering....
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doaj-526ec4b5220e4445aeaf120a5a46c10e2020-11-24T21:23:55ZengBrazilian Society of Chemical EngineeringBrazilian Journal of Chemical Engineering1678-438336136138210.1590/0104-6632.20190361s20180091S0104-66322019000100361ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATIONAlejandro Alonzo-GarciaVíctor X. Mendoza-EscamillaSergio A. Martinez-DelgadilloIsrael Gonzalez-NeriaClaudia del C. Gutiérrez-TorresJosé A. Jiménez-BernalABSTRACT The performances of the Standard κ-ε, RNG, Realizable, κ-ω and RSM turbulence models to describe the behavior of the flow in agitated tank reactors were evaluated. Because most of these tanks have complex geometries, structured meshing schemes are not a practical alternative in engineering. Two particular unstructured meshing schemes composed of either Cartesian Cut-Cell (CC) or Tetrahedral elements were tested in domains larger than 3 million cells. In this work, the blade thickness, which is usually disregarded, was accounted for. The performance of the turbulence models was validated by PIV measurements. A strong dependence on the grid size and the power number was found, with CC grids having good agreement with grids > 3.6 Million. The pumping number was independent of the cell number and the values agree with experimental data. The Realizable model resolved with a tetrahedral grid presented the overall best performance.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322019000100361&lng=en&tlng=enAgitated tankPitched blade turbine, Cut-CellRANSTetrahedral cellsPIV |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Alejandro Alonzo-Garcia Víctor X. Mendoza-Escamilla Sergio A. Martinez-Delgadillo Israel Gonzalez-Neria Claudia del C. Gutiérrez-Torres José A. Jiménez-Bernal |
spellingShingle |
Alejandro Alonzo-Garcia Víctor X. Mendoza-Escamilla Sergio A. Martinez-Delgadillo Israel Gonzalez-Neria Claudia del C. Gutiérrez-Torres José A. Jiménez-Bernal ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATION Brazilian Journal of Chemical Engineering Agitated tank Pitched blade turbine, Cut-Cell RANS Tetrahedral cells PIV |
author_facet |
Alejandro Alonzo-Garcia Víctor X. Mendoza-Escamilla Sergio A. Martinez-Delgadillo Israel Gonzalez-Neria Claudia del C. Gutiérrez-Torres José A. Jiménez-Bernal |
author_sort |
Alejandro Alonzo-Garcia |
title |
ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATION |
title_short |
ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATION |
title_full |
ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATION |
title_fullStr |
ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATION |
title_full_unstemmed |
ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATION |
title_sort |
on the performance of different rans based models to describe the turbulent flow in an agitated vessel using non-structured grids and piv validation |
publisher |
Brazilian Society of Chemical Engineering |
series |
Brazilian Journal of Chemical Engineering |
issn |
1678-4383 |
description |
ABSTRACT The performances of the Standard κ-ε, RNG, Realizable, κ-ω and RSM turbulence models to describe the behavior of the flow in agitated tank reactors were evaluated. Because most of these tanks have complex geometries, structured meshing schemes are not a practical alternative in engineering. Two particular unstructured meshing schemes composed of either Cartesian Cut-Cell (CC) or Tetrahedral elements were tested in domains larger than 3 million cells. In this work, the blade thickness, which is usually disregarded, was accounted for. The performance of the turbulence models was validated by PIV measurements. A strong dependence on the grid size and the power number was found, with CC grids having good agreement with grids > 3.6 Million. The pumping number was independent of the cell number and the values agree with experimental data. The Realizable model resolved with a tetrahedral grid presented the overall best performance. |
topic |
Agitated tank Pitched blade turbine, Cut-Cell RANS Tetrahedral cells PIV |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322019000100361&lng=en&tlng=en |
work_keys_str_mv |
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1725990468230053888 |