# Template:Demo AC BPA3

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- State any restrictions on simplifications to the geometry (e.g. three dimensional effects are important and thus 2-D idealisation must not be used; wind tunnel blockage effects are significant and thus the wind tunnel geometry must be modelled; the flow displays transient un-symmetric behaviour and thus a geometric symmetry element cannot be used etc.).

- Advise on the extent of the computational domain in order to capture all flow features and minimise uncertainties in the setting of boundary conditions.

- At each boundary of the computational domain provide advice on which boundary condition to use and how to set it up.