CFD Simulations AC7-03: Difference between revisions
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=CFD Simulations= | =CFD Simulations= | ||
==Overview of CFD Simulations== | ==Overview of CFD Simulations== | ||
Various large-eddy simulations (LES) and unsteady Reynolds-averaged Navier-Stokes (URANS) computations were carried out using the commercial flow solver /*ANSYS CFX (ANSYS Inc., PA, USA)/*. All simulations were performed at the nominal operation (design) point of the VAD. In total, five LES computations on different grid sizes were conducted for the verification of the LES results. The simulation at the finest grid was used as the reference case for the comparison with URANS. For the URANS cases, an extended grid convergence study was performed using seven URANS grids to analyze the influence of the spatial discretization on the main assessment parameters. Additionally, URANS computations with different turbulence models were performed on the finest grid for the comparison with the LES results. The used URANS turbulence models were: a <math> k </math>-<math> \omega </math>-model, | Various large-eddy simulations (LES) and unsteady Reynolds-averaged Navier-Stokes (URANS) computations were carried out using the commercial flow solver /*ANSYS CFX (ANSYS Inc., PA, USA)/*. All simulations were performed at the nominal operation (design) point of the VAD. In total, five LES computations on different grid sizes were conducted for the verification of the LES results. The simulation at the finest grid was used as the reference case for the comparison with URANS. For the URANS cases, an extended grid convergence study was performed using seven URANS grids to analyze the influence of the spatial discretization on the main assessment parameters. Additionally, URANS computations with different turbulence models were performed on the finest grid for the comparison with the LES results. The used URANS turbulence models were: a <math> k </math>-<math> \omega </math> model, a <math> k </math>-<math> \omega </math>-SST model, and a <math> \omega </math>-based Reynolds stress model. | ||
==Solution Strategy== | ==Solution Strategy== | ||
Revision as of 12:07, 2 November 2021
Turbulent Blood Flow in a Ventricular Assist Device
Application Challenge AC7-03 © copyright ERCOFTAC 2021
CFD Simulations
Overview of CFD Simulations
Various large-eddy simulations (LES) and unsteady Reynolds-averaged Navier-Stokes (URANS) computations were carried out using the commercial flow solver /*ANSYS CFX (ANSYS Inc., PA, USA)/*. All simulations were performed at the nominal operation (design) point of the VAD. In total, five LES computations on different grid sizes were conducted for the verification of the LES results. The simulation at the finest grid was used as the reference case for the comparison with URANS. For the URANS cases, an extended grid convergence study was performed using seven URANS grids to analyze the influence of the spatial discretization on the main assessment parameters. Additionally, URANS computations with different turbulence models were performed on the finest grid for the comparison with the LES results. The used URANS turbulence models were: a - model, a --SST model, and a -based Reynolds stress model.
Solution Strategy
Computational Domain
Boundary Conditions
Application of Physical Models
Numerical Accuracy
CFD Results
Contributed by: B. Torner — University of Rostock, Germany
© copyright ERCOFTAC 2021