BC_Type = SymmetryBC: This boundary condition is used at the symmetry surfaces. HyperXtrude imposes zero normal velocity at these planes.

Syntax for this boundary condition is:

SymmetryBC Boundary_Name { }

If the elements on this BC lie on a single plane and you know the components of the normal in x, y, and z, you can specify this value.

SymmetryBC Boundary_Name {

 Nx = component of normal in x direction

 Ny = component of normal in y direction

 Nz = component of normal in z direction

}

 

For example, if the face is in yz plane and the boundary is called sym_yz then

SymmetryBC sym_yz {

 

 Nx = 1.0

 Ny = 0.0

 Nz = 0.0

}

 

See Also:

Boundary Conditions