Abstract
A quasi-static crowfoot mooring model is developed and applied to the 5MW floating offshore wind turbine (FOWT) conceptualized by the National Renewable Energy Laboratory (NREL) in the Offshore Code Comparison Collaboration (OC3). This model is implemented into the computational fluid dynamics (CFD) solver CFDShip-Iowa V4.5. Free-decay tests for rigid-body degrees of freedom (DOF) and two system simulations in waves are performed with a 2-point added yaw stiffness model, as utilized by the OC3, and compared with the crowfoot results. Results using both models agree well with the OC3's results in all motions except surge and sway. The general crowfoot model is shown to eliminate the need for geometric line approximation. Frequency and amplitude differences in motions between the mooring line models and future work are discussed.