# Turn prescribed velocities on
set Prescribe internal velocities = true

# Use the Ascii data plugin to read in the prescribed velocity ASCII file
# In this cookbook, we use the initial composition file.
subsection Prescribed velocities
  subsection Ascii data model
    set Data directory       = $ASPECT_SOURCE_DIR/cookbooks/prescribed_velocity_ascii_data/
    set Data file name       = aspect_name_initial_composition.txt
  end

  subsection Velocity function
    set Variable names = x,y,t

    # Return u_x; u_y; u_z (u_z only used if in 3d)
    set Function expression = 0;0
  end
end
