Description
By default, boundary grid points are not moved by the elliptic solver. There are instances, however, when moving the boundary points subject to the PDE solution may be advantageous.
Use the Type pull down list to choose the way in which boundary points should be moved by the elliptic PDE solver.
Note: These boundary conditions are not related in any way whatsoever to the CAE boundary conditions.
Fidelity Pointwise's four types of boundary conditions are the following:
- Fixed: Boundary points are not affected by the elliptic PDE solution. This is the default boundary condition.
- Floating: Boundary points will "float" as though they were interior grid points. Floating boundary conditions are only applicable if Fidelity Pointwise is able to find a unique neighbor to the boundary among the grids selected for the elliptic solver. If a unique neighbor cannot be found for a particular grid point, then the boundary condition is converted to fixed for that grid point. Although the grid points on floating boundaries are computed as though they are interior grid points, the control functions are computed in each grid individually. This may result in control function discontinuities across the boundary leading to unexpected result.
- Orthogonal: Boundary points will move along the boundary shape in order to maintain orthogonality with the interior points. This option is only available for domain edges.
- Adapt: Boundary points will be clustered or influenced, by size field source or grid entities. As the solver runs, points on faces with the Adapt BC will move in order to meet the local size field target spacing. This option is only available for block faces.