Basis functionality
This subprogramme addresses the development of basis aspects of the two CFD codes, ReFRESCO and PARNASSOS.


Mission
To develop CFD tools for robust and efficient computation, with minimal numerical errors and accurate results.

State of the art
On this aspect, the present status regarding PARNASSOS is that it is widely exploited in ship design, and fully mature at least for its basis functionality; but that very limited steps will be taken to further accelerate and streamline its use. In particular, some recurrent issues on the multi-block coupling will be addressed. The great majority of the work concerns the ReFRESCO code, which is being further developed now. The development of its basis functionality is in its final stage and is to be essentially completed in the next 2-3 years; the focus then shifting towards more specific aspects.

Vision 2016
ReFRESCO
In 2016, discretisation aspects should be fully established, including e.g. details on excentricity and nonorthogonality corrections and boundary conditions. The coupled solvers developed before should have been improved and generalised, sliding interface techniques refined, and the turbulence modelling options extended.

PARNASSOS
A further acceleration and streamlining should have been achieved, and the multi-block coupling improved.

Vision 2020
ReFRESCO
On a longer term, the ‘basis functionality’ subprogramme should aim for a significant speed-up of time-dependent computations, and developments will be done towards simulating turbulent structures / LES.

Example applications
  • ReFRESCO : (un)steady CFD for flows around ships and offshore structures, at model and full scale.
  • ReFRESCO : Integrated CFD-tank studies and CFD-time-domain simulations.
  • ReFRESCO : More realistic time-dependent blunt body flows
  • PARNASSOS: Fast evaluation and hull form design for routine applications
  • PARNASSOS: Full-scale power and RPM predictions
  • PARNASSOS: Support for model-test extrapolation and setup of statistical CFD-database
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