( Incompressible Navier Stokes.
  Two-dimensional.
  Stationar.
  Shear flow.
  Middle node, node 5, should get x-velocity 0.5.
  A matrix solver is used. )

echo -no
number_of_space_dimensions 2
materi_velocity
materi_strain_total
materi_stress
end_initia

node 1  0 0 
node 2  1 0 
node 3  1 1 
node 4  0 1 
node 5  0.5 0.5 
element 1  -tria3 1 2 5 
element 2  -tria3 2 3 5
element 3  -tria3 3 4 5
element 4  -tria3 1 4 5

bounda_unknown 0  -ra 1 2 -ra -velx
bounda_time    0  0. 0. 100. 0.
bounda_unknown 1  -ra 3 4 -ra -velx
bounda_time    1  0.  1.  100. 1.
bounda_unknown 2  -ra 1 2 3 4 5 -ra -vely
bounda_time    2  0. 0. 100. 0.

group_type 0  -materi
group_materi_memory 0  -updated_without_rotation
group_materi_elasti_compressibility 0  1.0e5
group_materi_viscosity 0  1.0

print_filter 0  -node_dof -all -velx

control_timestep 0  1. 1.0
(control_print    0  -time_current -node_dof )

target_item 0  -node_dof 5 -velx
target_value 0  0.5 1.e-2
end_data
