M.Sc. Kay Schäfer


Turbulent secondary flows over spanwise inhomogeneous walls


Research Interests

  • Turbulent Flows
  • Heat and Mass Transfer
  • Environmental Flows
  • Computational Fluid Dynamics
  • High-Performance Computing



  • PhD student representative of graduate school for climate and environment - GRACE

Supervised Student Theses

Master theses by Jonathan Kostelecky (2020): "Secondary motions of Prandtl‘s second kind in turbulent channel flow"

Bachelor theses by Agnes Krimmel (2020): "Data-driven analysis of large-scale secondary motions"

Master theses by Jonathan Neuhauser (2021): "On the impact of spanwise inhomogeneous boundary conditions on secondary flows in turbulent channels"

Master theses by Linus Wrba (2021, extern): "LES of a wind turbine in the atmospheric boundary layer: parameter studies on inflow conditions"

Bachelor theses by Riko Haase (2021): "Analysis of the dynamics of secondary motions by data-driven methods"

Journal Publications

The effect of spanwise heterogeneous surfaces on mixed convection in turbulent channels
Schäfer, K.; Frohnapfel, B.; Mellado, J. P.
2022. Journal of Fluid Mechanics, 950, Art.Nr. A22. doi:10.1017/jfm.2022.773
Simulation of turbulent flow over roughness strips
Neuhauser, J.; Schäfer, K.; Gatti, D.; Frohnapfel, B.
2022. Journal of Fluid Mechanics, 945, Art.-Nr.: A14. doi:10.1017/jfm.2022.536
Modelling spanwise heterogeneous roughness through a parametric forcing approach
Schäfer, K.; Stroh, A.; Forooghi, P.; Frohnapfel, B.
2022. Journal of Fluid Mechanics, 930, A7. doi:10.1017/jfm.2021.850
Rearrangement of secondary flow over spanwise heterogeneous roughness
Stroh, A.; Schäfer, K.; Frohnapfel, B.; Forooghi, P.
2020. Journal of fluid mechanics, 885, R5. doi:10.1017/jfm.2019.1030
Secondary flow and heat transfer in turbulent flow over streamwise ridges
Stroh, A.; Schäfer, K.; Forooghi, P.; Frohnapfel, B.
2020. International journal of heat and fluid flow, 81, Article No.108518. doi:10.1016/j.ijheatfluidflow.2019.108518

Conference Contributions

Parametric forcing approach for secondary motions formation over inhomogeneous rough surfaces
Stroh, A.; Schäfer, K.; Frohnapfel, B.; Forooghi, P.
2021. ETMM13 Proceedings
Comparison of Different Solvers and Geometry Representation Strategies for Dns of Rough Wall Channel Flow
Theobald, F.; Schäfer, K.; Yang, J.; Frohnapfel, B.; Stripf, M.; Forooghi, P.; Stroh, A.
2021. 14th WCCM & ECCOMAS Congress 2020 : virtual congress, 11-15 January, 2021 / IACM, ECCOMAS. Ed.: F. Chinesta, International Centre for Numerical Methods in Engineering (CIMNE). doi:10.23967/wccm-eccomas.2020.089
Direct Numerical Simulations of a Turbulent Flow over Wall-Mounted Obstacles - A Comparison of Different Numerical Approaches
Schäfer, K.; Forooghi, P.; Straub, S.; Frohnapfel, B.; Stroh, A.
2020. Direct and Large Eddy Simulation XII. Ed.: M. García-Villalba, 91–96, Springer. doi:10.1007/978-3-030-42822-8_12
Investigation of turbulent budgets in channels with secondary motions induced by streamwise-aligned ridges
Schäfer, K.; Stroh, A.; Frohnapfel, B.; Gatti, D.
2019. 11th International Symposium on Turbulence and Shear Flow Phenomena (TSFP11), Southampton, UK, July 30 - August 2, 2019
Secondary flow impact on velocity and thermal fields of a structured turbulent channel flow
Stroh, A.; Schafer, K.; Forooghi, P.; Frohnapfel, B.
2019. Proceedings of 14th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Wicklow, IR, July 22-24, 2019