Hybrid convection scheme of Travin et al. for hybrid RAS/LES calculations.
Properties
- Blends two schemes based on local properties including
- wall distance
- velocity gradient
- eddy viscosity
- Originally developed for DES calculations to blend a low-dissipative scheme, e.g. linear, in the vorticity-dominated, finely-resolved regions and a numerically more robust, e.g. linearUpwind, convection scheme in irrotational or coarsely-resolved regions.
Usage
The scheme is specified using:
divSchemes
{
default none;
div(phi,U) Gauss DEShybrid
linear // scheme 1
linearUpwind grad(U) // scheme 2
0.65 // DES coefficient, typically = 0.65
30 // Reference velocity scale
2 // Reference length scale
0 // Minimum sigma limit (0-1)
1 // Maximum sigma limit (0-1)
1e-3; // Limiter of B function, typically 1e-03
}
Further information
Source code
References:
- First published in Travin et al. [83]
- Original publication contained a typo for C_H3 constant. Corrected version with minor changes for 2 lower limiters published in Spalart et al. [75]
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