Dynamic Performance and Added Resistance of Duisburg Test Case Ship Using Hybrid CFD- Strip Theory Method

To predict the ship's behavior in the real sea state, it is important to know its dynamic responses and added resistance in different physical and environmental conditions. Therefore, the current study employs the hybrid CFD-strip theory method to study the added resistance and dynamic responses (i.e., heave and pitch RAOs) of the DTC hull. For this purpose, different wavelengths and directions and various ship drafts and trims were considered as defined physical and environmental parameters. In addition, for the CFD approach, the finite volume method (FVM) using open source software of OpenFOAM was used, while the strip theory method was applied using Tribon. The results of the CFD and strip theory have been validated against the published experimental and numerical data, and an acceptable accordance was achieved. The obtained results indicate that an enhancement in incident wave angles increases heave and pitch RAOs. Moreover, draft change has a non-uniform effect on heave RAO, while draft reduction causes higher pitch RAO. An increase in trim by aft results in higher heave RAO. Moreover, an enhancement in trim by the bow increases the pitch RAO. Finally, the highest added resistance is achieved at the head sea for the small draft of T= 12 m and trim by bow 0.6 ° in case of wavelength equal to ship length.