TY - RPRT TI - Direct Numerical Simulation of Transitional and Turbulent Flows Over Multi-Scale Surface Roughness—Part I: Methodology and Challenges AU - Nardini, Massimiliano AU - Kozul, Melissa AU - Jelly, Thomas AU - Sandberg, Richard PY - 2023 DO - 10.1115/1.4063753 UR - https://www.osti.gov/biblio/2582735 ID - 2582735 ER -