preventing negative eddy viscosity
Merge branch 'feature_LES' of https://github.com/fpalacios/HiFiLES into feature_LES
Merge branch 'feature_LES' of https://github.com/fpalacios/HiFiLES into feature_LES
Merge branch 'feature_LES' of https://github.com/fpalacios/HiFiLES into feature_LES
Merge branch 'feature_LES' of https://github.com/fpalacios/HiFiLES into feature_LES
Merge branch 'feature_LES' of https://github.com/fpalacios/HiFiLES into feature_LES
Merge branch 'feature_LES' of https://github.com/fpalacios/HiFiLES into feature_LES
minor changes