14th Computational Fluid Dynamics Conference 1999
DOI: 10.2514/6.1999-3355
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Assessment of implicit time integration for LES

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“…Protection from this problem is guaranteed for solutions using explicit time integration, were the restriction of CFL number less than one based on local velocities is tighter than a restriction on eddy motion based on mean flow velocity. If an implicit method is employed in the transient solution, the user needs to be certain that maximum time steps continue to resolve eddy motion (see [205]). The time step size also needs to be substantially less than the smallest eddy decay time, but this is normally less restrictive than a CFL test.…”
Section: Recommendations For Lesmentioning
confidence: 99%
“…Protection from this problem is guaranteed for solutions using explicit time integration, were the restriction of CFL number less than one based on local velocities is tighter than a restriction on eddy motion based on mean flow velocity. If an implicit method is employed in the transient solution, the user needs to be certain that maximum time steps continue to resolve eddy motion (see [205]). The time step size also needs to be substantially less than the smallest eddy decay time, but this is normally less restrictive than a CFL test.…”
Section: Recommendations For Lesmentioning
confidence: 99%