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....

Full description

Saved in:
Bibliographic Details
Published in:Brazilian journal of chemical engineering 2019-03, Vol.36 (1), p.361-382
Main Authors: Alonzo-Garcia, Alejandro, Mendoza-Escamilla, Víctor X., Martinez-Delgadillo, Sergio A., Gonzalez-Neria, Israel, Gutiérrez-Torres, Claudia del C., Jiménez-Bernal, José A.
Format: Article
Language:English
Subjects:
ENGINEERING, CHEMICAL
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0104-6632
1678-4383
1678-4383
DOI:10.1590/0104-6632.20190361s20180091