Actuator surface model

Uniform vortex-sheet distribution for actuator surface model. See Alvarez' dissertation, Sec. 6.3.2.

Linear vortex-sheet distribution for actuator surface model. See Alvarez' dissertation, Sec. 6.3.2.

Alias for FLOWUnsteady.g_linear.

Pressure-like vortex-sheet distribution for actuator surface model. See Alvarez' dissertation, Sec. 6.3.2.