The State of Scale-Resolving Simulations for Aircraft High-Lift Applications: Summary of the Closing Discussion of the 2025 NASA High-Fidelity CFD Workshop

A thorough and robust discussion was held during the last session of the 2025 NASA CFD High-fidelity Workshop, regarding the success of the current RCA Technical Challenge (TC): to ‘Develop and demonstrate computationally efficient, eddy-resolving modeling tools that predict maximum lift coefficient for transport aircraft with the same accuracy as certification flight tests.’ The consensus of the delegates was that significant progress towards achieving the TC has been demonstrated, particularly through the collaborative development and use of Wall-Modeled Large-Eddy Simulation (WMLES). The remaining tasks required to fully meet the TC were highlighted. No consensus was reached regarding possible topics for a new RCA TC. However, many opinions were expressed and captured, and key emerging technologies that will likely affect it were discussed.