Verification of the Coupled Fluid/Solid Transfer in a CASL Grid-to-Rod-Fretting Simulation: A Technical Brief on the Analysis of Convergence Behavior and Demonstration of Software Tools for Verification

Technical Report · Thu Dec 01 00:00:00 EST 2011

DOI:https://doi.org/10.2172/1038207· OSTI ID:1038207

Copps, Kevin D. ^[1]

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

For a CASL grid-to-rod fretting problem, Sandia's Percept software was used in conjunction with the Sierra Mechanics suite to analyze the convergence behavior of the data transfer from a fluid simulation to a solid mechanics simulation. An analytic function, with properties relatively close to numerically computed fluid approximations, was chosen to represent the pressure solution in the fluid domain. The analytic pressure was interpolated on a sequence of grids on the fluid domain, and transferred onto a separate sequence of grids in the solid domain. The error in the resulting pressure in the solid domain was measured with respect to the analytic pressure. The error in pressure approached zero as both the fluid and solids meshes were refined. The convergence of the transfer algorithm was limited by whether the source grid resolution was the same or finer than the target grid resolution. In addition, using a feature coverage analysis, we found gaps in the solid mechanics code verification test suite directly relevant to the prototype CASL GTRF simulations.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1038207
• Report Number(s): SAND--2011-9153
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
ALGORITHMS
ANALYTIC FUNCTIONS
APPROXIMATIONS
COMPUTER CODES
COMPUTERS
CONVERGENCE
PROGRAMMING
RESOLUTION
SIMULATION
TARGETS
VERIFICATION