Fix .prm file in step-60

[fdrmrc]

With 4 refinement cycles near the interface the constraint on the ratio between the diameter of the two grids is not fulfilled in the case of a flower-like interface.

@luca-heltai I could push here the routine we are using to adjust that automatically. What do you think?

[marcfehling]

Thanks for the patch! Can you also update the corresponding tutorial documentation?

dealii/examples/step-60/doc/results.dox

Lines 381 to 425 in f1b6f24

	<h3> Test case 2 and 3: </h3>
	If we use the following parameter file:
	@code
	subsection Distributed Lagrange<1,2>
	set Coupling quadrature order = 3
	set Embedded configuration finite element degree = 1
	set Embedded space finite element degree = 1
	set Embedding space finite element degree = 1
	set Homogeneous Dirichlet boundary ids = 0,1,2,3
	set Initial embedded space refinement = 8
	set Initial embedding space refinement = 4
	set Local refinements steps near embedded domain = 4
	set Use displacement in embedded interface = false
	set Verbosity level = 10
	subsection Embedded configuration
	set Function constants = R=.3, Cx=.5, Cy=.5, r=.1, w=12
	set Function expression = (R+r*cos(w*pi*x))*cos(2*pi*x)+Cx; (R+r*cos(w*pi*x))*sin(2*pi*x)+Cy
	set Variable names = x,y,t
	end
	subsection Embedded value
	set Function constants =
	set Function expression = x-.5
	set Variable names = x,y,t
	end
	subsection Embedding Dirichlet boundary conditions
	set Function constants =
	set Function expression = 0
	set Variable names = x,y,t
	end
	subsection Embedding rhs function
	set Function constants =
	set Function expression = 0.0
	set Variable names = x,y,t
	end
	subsection Schur solver control
	set Log frequency = 1
	set Log history = false
	set Log result = true
	set Max steps = 1000
	set Reduction = 1.e-12
	set Tolerance = 1.e-12
	end
	end
	@endcode

[fdrmrc]

I updated the relevant lines in the the .dox file in this patch.

[marcfehling]

I updated the relevant lines in the the .dox file in this patch.

Oh, my bad! For some reason I thought you updated a stand-alone *.prm file...

[luca-heltai]

Marco, yes, I think we should update the code with the routine we had developed to fix the issue.