The work from the workshops in 2022 and 2024 is continuing during monthly telecons.
Monthly videoconferences
Participants meet on the first Monday of every month at 12pm (noon) US Eastern Time. The Zoom link for these calls is https://umd.zoom.us/j/4487374796. If you want to receive very infrequent e-mail updates, please add your name to this Google sheet.
Notes from telecons (continued from the old page):
- 12/02/2024:
- 11/04/2024:
- 10/07/2024:
- 09/03/2024 (moved to Tuesday due to Labor Day):
- 08/05/2024 (cancelled due to vacations)
- 07/01/2024:
- 06/03/2024:
- 05/06/2024:
- Agenda: discuss airfoil case with fixed \( h_{\rm wm} \) in multiple codes
- 04/01/2024:
- Timofey Mukha described his airfoil simulations and his a priori study of wall-model accuracy. An important point of the latter was how, for this particular case, choosing \( h_{\rm wm}(x) \approx 0.1 \delta_{99}(x) \) results in very good a priori accuracy due to luck.
- Johan presented some numerical experiments of the smooth ramp problem where he increased the WENO fraction in the incoming boundary layer to produce different boundary layer states. Adding 1% WENO did not change much, but adding 4% WENO drastically reduced the separation bubble size. Not clear how to interpret these findings, though.
- 03/04/2024:
- We agreed to slightly change the format going forward. The monthly telecons will continue (at noon US Eastern time on the first Monday of every month), but we will try to make these discussions more technical. The results comparisons will be updated on an ongoing basis rather than only once every two years. We will then meet formally or informally at every AIAA conference (Scitech and Aviation) for in-person discussions. In other words, we will function like an AIAA Working Group, which is essentially how this all started out.
- ZJ Wang, Christoph Brehm, Dan Garmann and Timofey Mukha will re-run the airfoil case with identical wall-modeling exchange location (likely \(h_{\rm wm}/c = 0.001 \)) and without any special handling of the laminar/transitional region. The idea is to compare the different codes with identical, even if imperfect, settings.
- Dan Garmann is taking the lead in putting together a paper for Aviation 2024 summarizing the January workshop. This paper won’t include updated results, but instead will provide a snapshot of the blind predictions at the workshop.