The SAUNA advanced CFD system from QinetiQ Ltd, using GEMS as the
Graphical User Interface,
enables rapid, high accuracy modelling of aero- and hydrodynamic cases using
structured multiblock grids. Development, validation and extensive use of
the SAUNA code, with challenging military and civil airframes, has been
central to aerodynamics work at QinetiQ, formerly the
UK Defence Evaluation and Research Agency, for more than 15 years.
The multiblock topology generation is automated through an interactive
process to determine block decomposition, component associated
embedding, block dimensioning, etc. SAUNA can handle complex
configurations and interactions, such as wing, body, pylon and
Surface elliptic grids are generated at each of the airframe and
farfield surfaces as well as "control" planes in the field. The
surface grids can be edited interactively within GEMS, giving the
capability to redefine point distributions along block boundaries to
maximise grid quality. An elliptic field grid is generated within the
domain between these bounding surface grids.
SAUNA offers finite volume inviscid (Euler) and viscous (viscous
coupled Euler or Reynolds-averaged Navier-Stokes) flow solvers using
multi-grid convergence acceleration techniques.