ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATION Alejandro Alonzo-Garcia Víctor X. Mendoza-Escamilla Sergio A. Martinez-Delgadillo Israel Gonzalez-Neria Claudia del C. Gutiérrez-Torres José A. Jiménez-Bernal 10.6084/m9.figshare.8987594.v1 https://scielo.figshare.com/articles/dataset/ON_THE_PERFORMANCE_OF_DIFFERENT_RANS_BASED_MODELS_TO_DESCRIBE_THE_TURBULENT_FLOW_IN_AN_AGITATED_VESSEL_USING_NON-STRUCTURED_GRIDS_AND_PIV_VALIDATION/8987594 <div><p>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.</p></div> 2019-07-24 03:18:55 Agitated tank Pitched blade turbine, Cut-Cell RANS Tetrahedral cells PIV