Computational Fluid Dynamics
Karlsruher Institut für Technologie (KIT)
Institute of Fluid Mechanics
The research investigates turbulent jet impingement and turbulent wall jets using direct numerical simulations. An impinging jet is realized by the impingement of a circular free jet onto a solid wall, whereas a wall jet represents a flow confined on one side by a solid wall and on the other by a free-shear layer. The assessment of surface roughness effects on these flows and the possibility of modeling such effects is one of the main objectives of the present study. The second key aspect of the investigation is the influence of mass-flux blowing through the wall on the near-wall mean momentum transfer. The introduction of such an ‘active wall’ opens new research scenarios which aim at mimicking the release of chemical species from a wall that typically occurs when a turbulent flame flows over a solid wall (pyrolisis). To isolate the role of turbulence, only incompressible, non-reactive flows with constant properties will be addressed by the proposed investigation.