code: def vel_term_floc(ConcAl, ConcClay, coag, material, DIM_FRACTAL,
                    DiamTarget, Temp):
      
      WaterDensity = pc.density_water(Temp).magnitude
      return (((pc.gravity.magnitude * material.Diameter**2)
               / (18 * PHI_FLOC * pc.viscosity_kinematic(Temp).magnitude)
               )
              * ((dens_floc_init(ConcAl, ConcClay, coag, material).magnitude
                  - WaterDensity
                  )
                 / WaterDensity
                 )
              * (DiamTarget / material.Diameter) ** (DIM_FRACTAL - 1)
              )
docs: Calculate floc terminal velocity.