Ivan Bermejo-Moreno
High-Speed Turbulence with Shocks over Non-Adiabatic and Flexible Walls, 2021
1,800,000 Node-Hours
This project investigates how supersonic wall-bounded turbulent flows are affected by the thermal wall boundary condition and how they interact with flexible walls. High-fidelity simulations at different Mach numbers, Reynolds numbers, and imposed wall temperatures will be used to create a database that advances the theoretical description of how the mean velocity profile scales with these factors. As current theories fail at high Mach numbers for either strongly cooled walls or nearly adiabatic walls, the results of this work will be used to develop a predictive model that remains accurate across all flow conditions. This, in turn, will lead to improved modeling techniques for near-wall turbulence and improved semi-empirical friction.
This project also considers the interaction between supersonic turbulent boundary layers and shockwaves in the presence of rigid and flexible walls, and will create highly resolved reference data for several such cases, including cases with crossflow that create skewed mean velocity profiles. These data will be used to assess and validate modeling techniques for near-wall turbulence in the context of large eddy simulations.
Comments:
"We are honored and very thankful for the opportunity to present our work in this wonderful exhibition that connects art and science as expressions of human creativity. Science often exposes a wondrous side of our physical world, inspiring us to disseminate the beauty we observe from any new discovery of knowledge to the best of our ability, sometimes with glimpses of artistic traits. Like painters are bound by their canvases, oils, and brushes, writers by the rules of their language, musicians by the sound of their instruments, and dancers by the ultimate limits of the human body, scientists are bound by the laws of nature they strive to discover and truthfully reflect in any attempt at an artistic representation. Even then, science also equips us with marvelous tools for creative exploration akin to a limitless palette of colors, endless possible combinations of words, melodies, and choreographies available to craft an artistic expression of scientific findings. We hope that those who attend the Show will enjoy these artistic manifestations of the scientific endeavor."
- Ivan Bermejo-Moreno, Assistant Professor of Aerospace and Mechanical Engineering, University of Southern California