Key Data

• pseudo-spectral solver SIMSON
• streamwise and spanwise periodicity of simulation domain
• weak random forcing for turbulence tripping
• Grid size N_x×N_y×N_z=3072×301×256
• Domain size L_x×L_y×L_z=3000×120×100 (based on initial displacement thickness)
• uncontrolled flow: Re_θ=400-2500, Re_τ=170-850
• three control types: uniform blowing with 0.5%U_∞, damping of wall-normal velocity component by imposition of body force and opposition control scheme
• control region location: x=186-386

Datasets

• streamwise development of flow quantities:   uncontrolled   uniform blowing   body force damping   opposition control
• flow statistics for uncontrolled flow:   x=350   x=700   x=1500   x=2500  
• flow statistics for uniform blowing:   x=350   x=700   x=1500   x=2500  
• flow statistics for body force damping:   x=350   x=700   x=1500   x=2500  
• flow statistics for opposition control:   x=350   x=700   x=1500   x=2500  

Video 1: Comparison of temporal development of controlled flows after control activation. Visualization of turbulent structures in turbulent developing boundary layer is performed using isosurfaces of λ₂-criterion (λ₂=-0.005) coloured by their streamwise velocity (first part of the video) and wall-normal coordinate (second part of the video).

References

Stroh, A., Hasegawa, Y., Schlatter, P., & Frohnapfel, B. (2016). Global effect of local skin friction drag reduction in spatially developing turbulent boundary layer. Journal of Fluid Mechanics, 805, 303-321, doi: 10.1017/jfm.2016.545
Bibtex citation: bibtex-file

Stroh, A., Frohnapfel, B., Schlatter, P., & Hasegawa, Y. (2015). A comparison of opposition control in turbulent boundary layer and turbulent channel flow. Physics of Fluids, 27(7), 075101, doi: 10.1063/1.4923234
Bibtex citation: bibtex-file

Contact

Please contact Alexander Stroh (stroh∂kit.edu) regarding further information on simulations and corresponding results.