**Organizers**__CHAIR:__**Ashton, Neil**(Amazon Web Services) PID: L-001**Batten**, Paul (Metacomp Technologies) PID: L-002**Cary**, Andrew (Boeing) PID: L-003**Holst**, Kevin (DoD CEATE-AV) PID: L-005**Long**, Mike (The Spaceship Company) PID: L-004**Powell**, Nick (Gulfstream Aerospace) PID: L-006**Skaperdas**, Vangelis (BETA-CAE) PID: L-007**Taylor**, Nigel (MBDA) PID: L-008

**Members****Abdessemed**, Chawki (Cranfield University) PID: L-009**Ahmad**, Nashat (NASA LaRC) PID: L-057**Anderson**, Kyle (NASA LaRC) PID: L-010**Balakrishnan**, Narayanarao (Indian Institute of Science) PID: L-011**Beall**, Mark (Simmetrix, Inc.) PID: L-012**Bennett**, Shawn (Gulfstream Aerospace) PID: L-013**Bercin**, Kutalmis (ESI-OpenCFD Ltd.) PID: L-014**Bicer**, Baris (Turkish Aerospace) PID: L-015**Browne**, Oliver (NASA Ames) PID: L-016**Chitale**, Kedar (U Colorado) PID: L-017**Contractor**, Krishna (AneCom) PID: L-018**Degrigny**, Johan (CERFACS) PID: L-055**Dehpanah**, Payam (TU Kaiserslautern) PID: L-019**Djeddi**, Reza (University of Tennessee, Knoxville) PID: L-020**Duda**, Ben (Dassault Systemes) PID: L-021**Edge**, Brian (Metacomp Technologies) PID: L-022**Escobar-Gomez**, Jaime Alberto (Universidad San Buenaventura Bogota) PID: L-023**Fitzgibbon**, Thomas (Flexcompute) PID: L-049**Fozan Ur Rab**, Mohammad (NED University of Engineering and Technology) PID: L-024**Gagliardi**, Lucy (ICON Technology and Process Consulting) PID: L-025**Gopalakrishnan**, Pradeep (Dassault Systemes) PID: L-026**Hirsch**, Charles (Numeca International) PID: L-027**Hoarau**, Yannick (Strasbourg University) PID: L-028**Housman**, Jeffrey (NASA Ames) PID: L-029**Imamura**, Taro (U Tokyo) PID: L-030**Jansen**, Ken (U Colorado, Boulder) PID: L-031**Kirby**, Andrew (U Wyoming) PID: L-032**Kiris**, Cetin (NASA Ames) PID: L-033**Laskowski**, Gregory (Dassault Systemes) PID: L-034**Li**, Yanbing (Dassault Systemes) PID: L-035**Lopez**, Omar (Universidad de los Andes) PID: L-036**Luo**, Andy (TotalSim) PID: L-037**Melber-Wilkending**, Stefan (DLR) PID: L-038**Mockett**, Charles (Upstream CFD) PID: L-039**Molina**, Eduardo (Stanford University) PID: L-040**Pleitez**, Caesar (Northrop Grumman) PID: L-056**Probst**, Axel (DLR) PID: L-041**Pylypenko**, Anton (Engys) PID: L-042**Rivola**, Vincent (ICON Technology and Process Consulting) PID: L-043**Shellabarger**, Eli (NASA Langley Research Center) PID: L-044**Spalart**, Philippe (Boeing ret) PID: L-045**Vatsa**, Veer (NASA Langley Research Center) PID: L-046**Viitanen**, Ville (VTT Tech Research Center) PID: L-047**Vos**, Jan (CFS Engineering) PID: L-048**Wang**, Qiqi (MIT) PID: L-049**Wood**, Stephen (NASA LaRC) PID: L-050**Yang**, Hong (Bombardier Aviation) PID: L-051**Yao**, Yufeng (U West of England) PID: L-052**Yasuda**, Hidemasa (Kawasaki Heavy Industries, Ltd.) PID: L-053**Yu**, Zongfu (Flexcompute) PID: L-049**Zastawny**, Marian (Siemens) PID: L-054

**Key Questions**- Do hybrid RANS-LES methods provide improved accuracy over RANS methods to predict CLmax for the right reason (pre and post CLmax to understand separation process)
- Do hybrid RANS-LES methods provide improved accuracy over RANS methods to predict Flap Deflection for the right reason (pre and post CLmax to understand separation process)
- What mesh resolution/type is required to achieve this accuracy and what is the sensitivity?
- What time-step and temporal scheme is required to achieve this accuracy and what is the sensitivity?
- What is the Influence of the underlying RANS model for a hybrid RANS-LES method?
- What is the most suitable HRLM shielding function for high-lift aircraft configurations?
- What is the most appropriate HRLM filter-width definition for high-lift aircraft configurations?
- Best-Practices to determine suitable hybrid RANS-LES mesh resolution prior to solution.
- What is the HPC cost compared to steady RANS?
- Best-Practices to achieve alpha sweeps for hybrid RANS-LES (i.e address hysteresis and bifurcation)
- What is the sensitivity to inner-iteration convergence for hybrid RANS-LES simulations of high-lift aircraft configurations?
- Best-Practices to achieve statistical convergence for Hybrid RANS-LES simulations (e.g., total time-averaging period and point of time-averaging start)
- What is the sensitivity to the boundary conditions for hybrid RANS-LES of high-lift aircraft configurations? (e.g., sensitivity to small variations in input boundary conditions to CLmax)
- What is the sensitivity to the choice of convective flux scheme for the hybrid RANS-LES of high-lift aircraft configurations?

**Documents**- Alternative Test Case 3: Three-Element 30P-30N Airfoil is available on the Test Cases Page.

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Recent significant updates:

01/04/2021 - Initial PID assignment

**Responsible NASA Official:**
Christopher Rumsey

**Page Curator:**
Christopher Rumsey

**Last Updated:** 11/16/2021