A71. Tests involving an unstructured grid
The bathymetry in this set of tests involves a ringshaped area around a circular island
surrounded with circular depth contours. A program "Ringtest.for" calculates
the nodal coordinates and the element structure.
The depth at the outer boundary (radius 1000m) is 10 m; the depth at the inner boundary
(radius 14.78 m) is 0.1478 m.
The tests verify mainly several boundary condition options.
The following cases are considered:
 A71a
 computation of coarse unstructured grid with parametric boundary condition
 A71b
 computation of fine unstructured grid with parametric boundary condition
 A71c
 computation with a regular grid; the bottom values were generated in run A71a.
This run generates the boundary conditions for run A71d
 A71d
 computation of coarse unstructured grid nested in the previous regular grid
 A71e
 computation of fine unstructured grid nested in the previous regular grid;
this run requires interpolating in a nested boundary
 A71f
 computation of unstructured grid with constant parametric boundary condition defined
along a segment; end points of the segment are defined with the XY option in
counterclockwise order
 A71g
 computation of unstructured grid with constant parametric boundary condition defined
along a segment; end points of the segment are defined with the XY option in
clockwise order
 A71h
 computation of unstructured grid with variable parametric boundary condition defined
along a segment; end points of the segment are defined with the XY option in
counterclockwise order
 A71i
 computation of unstructured grid with variable parametric boundary condition defined
along a segment; end points of the segment are defined with the XY option in
clockwise order
 A71j
 computation of unstructured grid with variable parametric boundary condition defined
along a segment; the points of the segment are defined with the IJ option
