Numerical Experiments Using a Convective Flux Limiter on a Turbulent Single-Mode Rayleigh-Taylor Instability

Technical Report · Mon Jul 10 00:00:00 EDT 2000

DOI:https://doi.org/10.2172/793972· OSTI ID:793972

Cloutman, L D

Direct numerical simulation and large eddy simulations are powerful tools for studying turbulent flows. Unfortunately, they are computationally demanding in terms of run times, storage, and accuracy of the numerical method used. In particular, high order methods promise high accuracy on a given grid, but they often fail to deliver the expected accuracy due to dispersive truncation errors that appear as unphysical oscillations in the numerical solutions. This report describes a nonlinear flux limiter that has been applied to the second-order tensor viscosity method and markedly reduces the dispersive truncation errors. A Rayleigh-Taylor instability is simulated to show how well the flux limiter works.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE Office of Defense Programs (DP) (US)
• DOE Contract Number: W-7405-Eng-48
• OSTI ID: 793972
• Report Number(s): UCRL-ID-139735; TRN: US200302%%690
• Resource Relation: Other Information: PBD: 10 Jul 2000
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACCURACY
NUMERICAL SOLUTION
OSCILLATIONS
RAYLEIGH-TAYLOR INSTABILITY
SIMULATION
STORAGE
TURBULENT FLOW
VISCOSITY