Hello all,
I have a simple solid cylindrical geometry and I want to apply boundary conditions in polar coordinates such as constraint the cylinder in the radial direction but set free in the tangential and axial direction. I have standard displacement as an independent variable.
V2 = VectorFunctionSpace(mesh, Element,2)
and I can define the polar coordinates as following form
r = Expression("sqrt(x[0]*x[0]+x[1]*x[1])")
theta = Expression("atan2(x[1],x[0])")
However, I have no idea about how it should be used in DirichletBC.
Since the “V2” is in cartesian coordinates when I try to define the Diricthlet BC as following
bc1 = DirichletBC(V2,??????,outer_bc)
where outer_bc is the outer cylindirical face of the cylinder. Any idea to solve this issue ? Thanks.
