Go4Hybrid: A European Initiative for Improved Hybrid RANS-LES Modelling

  • Charles MockettEmail author
  • Werner Haase
  • Frank Thiele
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 130)


An overview is given of a new EU-funded project targeting the mitigation of a key remaining issue with hybrid RANS-LES methods. The grey area problem arises due to inconsistencies in the transition between RANS and LES paradigms and has a detrimental impact on the early separated shear layer, particularly for e.g. shallow separating/reattaching flows. Progress on this front is seen as central to improving industrial confidence in CFD for situations typical of the limits of machine performance.


Shear Layer Grey Area Delta Wing Separate Shear Layer Recirculation Bubble 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The Go4Hybrid project (“Grey Area Mitigation for Hybrid RANS-LES Methods”) is funded by the European Union Seventh Framework Programme FP7/2007–2013 under grant agreement no. 605361. The Partners of the Go4Hybrid project are CFD Software E+F GmbH (DE—coordinators), German Aerospace Center (DE), National Aerospace Laboratory (NL), New Technologies and Services LLC (RU), ONERA (FR), Swedish Defence Research Agency (SE) and the University of Manchester (GB). The ATAAC project (“Advanced Turbulence Simulation for Aerodynamic Application Challenges”) was funded by the European Seventh Framework Programme FP7/2007–2013 under grant agreement no. 233710.


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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  1. 1.CFD Software Entwicklungs- und Forschungsgesellschaft mbHBerlinGermany
  2. 2.Werner Haase Aeronautics ConsultantsNeubibergGermany

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