Entropy production in turbulence parameterisations ((04) M04)

• Subject Area: Atmospheric Science
• Term: from 2016 to 2020
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 274762653

We aim at a modification of sub-scale parameterisation schemes for heat, buoyancy, and momentum fluxes which are associated with energy dissipation and internal entropy production. We assess existing parameterisation schemes in view of the second law of thermodynamics and aim at their modification to conform with this law. Additionally, we wish to deal with the statistical mechanical fluctuations occurring on small scales, which can lead to temporary negative diffusion coefficients in sub-grid parameterisations. An outcome is the combination of dissipation and backscatter in a unified approach.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 181: Energy transfers in Atmosphere and Ocean
• International Connection: United Kingdom
• Applicant Institution: Universität Hamburg
• Project Heads: Privatdozent Dr. Richard Blender; Dr. Almut Gaßmann; Professor Dr. Valerio Lucarini