Linear Current Coefficients

For each direction specify the linear current force coefficient for six degree of freedoms.

1. Symmetry

The symmetry option determines how current coefficients are specified across different directions:

  • No symmetry: Coefficients must be specified for the full range [0, 360] degrees. Coefficients at 0 and 360 degrees must be equal.

  • Symmetry about Y=0: Coefficients are specified for [0, 180] degrees. Both 0 and 180 degrees must be included. This represents single symmetry about the x-z plane.

  • Double symmetry: Coefficients are specified for [0, 90] degrees. Both 0 and 90 degrees must be included. This represents double symmetry about both x-z and y-z planes.

2. Current force coefficients

  • Direction: Direction, [deg]

  • Linear current force coefficient for freedom 1-3 \( Ns/m\) and for 4-6 \(Ns\)

    • C11: Linear current force coefficient in surge

    • C12: Linear current force coefficient in sway

    • C13: Linear current force coefficient in heave

    • C14: Linear current force coefficient in roll

    • C15: Linear current force coefficient in pitch

    • C16: Linear current force coefficient in yaw