Wedge - Boundary Condition

Wedge is a boundary condition used for simulating axisymmetric problems, where the computational domain represents a wedge-shaped slice of the axisymmetric geometry. This boundary condition is particularly useful for reducing the complexity and computational cost of simulations involving cylindrical or rotational symmetry.

The pair of patches must be symmetrically adjacent to the coordinate plane. The separation between wedge patch pairs should consist of a single layer of cells. Additionally, the points should appear collocated when viewed from the normal direction of the mid-plane.

Below there is an example of "wedge" geometry.

For 2-dimensional axisymmetric cases, such as a cylinder, the geometry is specified as a wedge with a small angle (e.g., 5 degrees) and is 1 cell thick. This wedge runs along the centerline and straddles one of the coordinate planes.

To define the Wedge boundary condition, after meshing, in the Mesh panel the boundary type must be set to Wedge.

No further actions are necessary (in the Boundary Conditions panel). All the dependent variables will be automatically set to Wedge type.

In this section, we propose boundary conditions that are alternative to Wedge. While they may fulfill similar purposes, they might be better suited for a specific application and provide a better approximation of physical world conditions.