Verification and Validation Activities for the Multi-Fidelity Toolkit

Technical Report · Tue Feb 01 04:00:00 EST 2022

DOI:https://doi.org/10.2172/1844319· OSTI ID:1844319

Lance, Blake W. ^[1]; Krueger, Aaron M. ^[1]; Freno, Brian A. ^[1]; Wagnild, Ross M. ^[1]

---

1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

The Multi-Fidelity Toolkit (MFTK) is a simulation tool being developed at Sandia National Laboratories for aerodynamic predictions of compressible flows over a range of physics fidelities and computational speeds. These models include the Reynolds-Averaged-Navier-Stokes (RANS) equations, the Euler equations, and modified Newtonian aerodynamics (MNA) equations, and they can be invoked independently or coupled with hierarchical Kriging to interpolate between high-fidelity simulations using lower-fidelity data. However, as with any new simulation capability, verification and validation are necessary to gather credibility evidence. This work describes formal code- and solution-verification activities as well as model validation with uncertainty considerations. Code verification is performed on the MNA model by comparing with an analytical solution for flat-plate and inclined-plate geometries. Solution-verification activities include grid-refinement studies of HIFiRE-1 wind tunnel measurements, which are used for validation, for all model fidelities. A thorough treatment of the validation comparison with prediction error and validation uncertainty is also presented.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: NA0003525
• OSTI ID: 1844319
• Report Number(s): SAND2022-1479; 703352
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
74 ATOMIC AND MOLECULAR PHYSICS