In the simulaton below, the filament was initially placed
transmurally (vertically). The scrol wave turns counter clockwise.
The fiber angle is measured from the positive x-axis.
Counter clockwise is the positive angle direction.
The fiber rotates from -120 to 0.
The domain 50mm x 50mm x 20 mm is
discretized into 100 x 100 x 40 unless mentioned otherwise.
For a thin tissue, the domain is 50mm x 50mm x 10 mm on the same
100 x 100 x 40 mesh.