UFR 3-35 Best Practice Advice
Cylinder-wall junction flow
Underlying Flow Regime 3-35
Best Practice Advice
Key Physics
To cover this highly complex flow situation, a high spatial resolution is required for both the CFD as well as the experiment. The horseshoe vortex dynamics are driven by the downflow in front of the cylinder. This downward directed flow is caused by a vertical pressure gradient, which in turn depends on the shape of the approaching inflow profile. Therefore, to study the horseshoe vortex in detail and in a generic way, the development of a fully developed turbulent boundary layer approaching the cylinder should be ensured in the first place. Furthermore, the wall-shear stress is highly sensitive with respect to the spatial resolution of the data. To cover the strong velocity gradients, in particular of the the near-wall jet, high spatial resolution is required.
Numerical Modelling Issues
Discretisation method
Grids and grid resolution
Boundary conditions and computational domain
Physical Modelling
Turbulence modelling
Transition modelling
Near-wall modelling
Other modelling
Application Uncertainties
Recommendations for Future Work
Contributed by: Ulrich Jenssen, Wolfgang Schanderl, Michael Manhart — Technical University Munich
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