TY - JOUR
T1 - On the performance of different rans based models to describe the turbulent flow in an agitated vessel using non-structured grids and PIV validation
AU - Alonzo-Garcia, Alejandro
AU - Mendoza-Escamilla, Víctor X.
AU - Martinez-Delgadillo, Sergio A.
AU - Gonzalez-Neria, Israel
AU - Del C Gutiérrez-Torres, Claudia
AU - Jiménez-Bernal, José A.
N1 - Publisher Copyright:
© 2019 Assoc. Brasiliera de Eng. Quimica / Braz. Soc. Chem. Eng.. All rights reserved.
PY - 2019
Y1 - 2019
N2 - The performances of the Standard κ-e, RNG, Realizable, κ-w 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.
AB - The performances of the Standard κ-e, RNG, Realizable, κ-w 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.
KW - Agitated tank
KW - PIV
KW - Pitched blade turbine, Cut-Cell
KW - RANS
KW - Tetrahedral cells
UR - http://www.scopus.com/inward/record.url?scp=85070634563&partnerID=8YFLogxK
U2 - 10.1590/0104-6632.20190361s20180091
DO - 10.1590/0104-6632.20190361s20180091
M3 - Artículo
AN - SCOPUS:85070634563
SN - 0104-6632
VL - 36
SP - 361
EP - 382
JO - Brazilian Journal of Chemical Engineering
JF - Brazilian Journal of Chemical Engineering
IS - 1
ER -