The wedge boundary condition defines an axisymmetric boundary condition. The model and flow must be axisymmetric along a central line such that all physical variables of the flow have the same value and distribution at a radius and angle.

The axisymmetric ‘wedge’ boundary is specified by two planes that must be selected on separate sides of the domain on surfaces running along the axis.


In case of a 2-dimensional cylinder, the geometry would be specified as a wedge with a small angle (< 5 deg) and 1 cell thickness.


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