#
# ns2d.ds0:  Triangle mesh with 9 vertices, 8 triangles in unit square
#
# Vertex list:
  9                   Number of vertices
0.0  0.0  0.0  0.0    Vertex coordinates and initial velocity
0.5  0.0  0.0  0.0
1.0  0.0  0.0  0.0
0.0  0.5  0.3  0.0
0.5  0.5  0.0  0.0
1.0  0.5  0.0  0.0
0.0  1.0  0.0  0.0
0.5  1.0  0.0  0.0
1.0  1.0  0.0  0.0
# Triangle list:
  8                   Number of triangles
  0  4  3             CCW-ordered vertex indices of first triangle
  0  1  4
  1  2  4 
  2  5  4
  3  4  6
  4  7  6
  4  8  7
  4  5  8
# Inflow and outflow boundary segment list:
  2                   Number of boundary segments
  1  9  8             Inflow boundary on left
 -1 13 12             Outflow boundary on right