%0 Conference Paper %1 10.1007/978-3-030-66792-4_23 %A Chu, Xu %A Müller, Johannes %A Weigand, Bernhard %B High Performance Computing in Science and Engineering '19 %C Cham %D 2021 %E Nagel, Wolfgang E. %E Kröner, Dietmar H. %E Resch, Michael M. %I Springer International Publishing %K pa-a rp-a2 sfb1313 %P 343--354 %T Interface-Resolved Direct Numerical Simulation of Turbulent Flow over Porous Media %X Direct numerical simulations (DNS) are conducted for turbulent flows over porous media. A high-order spectral/hp element method is adopted for solving the incompressible Navier-Stokes equations. Resolving flow details close to the interface relies on an adaptive polynomial refinement based on a conforming mesh. Four DNS cases up to bulk Reynolds number \$\$Re=15\,\000\$\$Re=15,000are conducted with a total mesh resolution up to 1 billion degrees of freedom. The highly-resolved DNS enables us to focus on two major physical phenomenon: (i) the turbulence modulation including drag reduction and flow control; (ii) the turbulent/non-turbulent interface close to the porous surface. The numerical solver exhibits an excellent scalability up to 96k cores on Hazel Hen. Strong scaling tests indicate an efficiency of 70\$\$\backslash\%\$\$\%with around 5, 000 mesh-nodes per core, which indicates a high potential for an adequate use of current and next-generation HPC platforms to investigate turbulent flows over porous media. %@ 978-3-030-66792-4

@inproceedings{10.1007/978-3-030-66792-4_23, abstract = {Direct numerical simulations (DNS) are conducted for turbulent flows over porous media. A high-order spectral/hp element method is adopted for solving the incompressible Navier-Stokes equations. Resolving flow details close to the interface relies on an adaptive polynomial refinement based on a conforming mesh. Four DNS cases up to bulk Reynolds number {\$}{\$}Re=15{\{},{\}}000{\$}{\$}Re=15,000are conducted with a total mesh resolution up to 1 billion degrees of freedom. The highly-resolved DNS enables us to focus on two major physical phenomenon: (i) the turbulence modulation including drag reduction and flow control; (ii) the turbulent/non-turbulent interface close to the porous surface. The numerical solver exhibits an excellent scalability up to 96k cores on Hazel Hen. Strong scaling tests indicate an efficiency of 70{\$}{\$}{\backslash}{\%}{\$}{\$}{\%}with around 5, 000 mesh-nodes per core, which indicates a high potential for an adequate use of current and next-generation HPC platforms to investigate turbulent flows over porous media.}, added-at = {2021-06-01T08:22:57.000+0200}, address = {Cham}, author = {Chu, Xu and Müller, Johannes and Weigand, Bernhard}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2c3211989a25ddc8809b3db4d8f3a6ed8/sfb1313-puma}, booktitle = {High Performance Computing in Science and Engineering '19}, editor = {Nagel, Wolfgang E. and Kröner, Dietmar H. and Resch, Michael M.}, interhash = {d4a1990a5e13dc02f32f80b45862fdc4}, intrahash = {c3211989a25ddc8809b3db4d8f3a6ed8}, isbn = {978-3-030-66792-4}, keywords = {pa-a rp-a2 sfb1313}, pages = {343--354}, publisher = {Springer International Publishing}, timestamp = {2021-06-01T06:22:57.000+0200}, title = {Interface-Resolved Direct Numerical Simulation of Turbulent Flow over Porous Media}, year = 2021 }