Custom surface size values will be used for both the valve wall and the symmetry plane in order to control the density of the trimmed cell mesh. In the case of the valve wall, the surface size settings are used to increase the mesh density in the vicinity of the valve area above and beyond any refinements due to proximity effects. For the symmetry plane, there is no requirement to maintain the global surface mesh density, so we will allow the mesh size to increase up to a maximum size equal to the base size. We could also repeat this for the inlet and outlet boundaries if desired although this will not be demonstrated here.
The same valve wall inputs as before will be used so we can proceed directly to the symmetry plane mesh conditions.
The surface size values for the boundary can now be changed.
The Relative Target Size is already set to be 100% of the base size and does not need to be changed. The symmetry plane is now no longer constrained in the same way as the other surfaces in the geometry and larger cell sizes will be seen on this plane. We can now proceed to perform the meshing.
