**Preface to "CFD Simulations of Marine Hydrodynamics"**

Marine Hydrodynamics covers plenty of subjects relevant to naval architecture, ocean and marine engineering, and it has been one of the essential interests of researchers for a long time. There is a plethora of ways to deal with Marine Hydrodynamics problems. Computational Fluid Dynamics (CFD) approach has been routinely employed in naval architecture and ocean engineering due to the availability of ever-increasing computational power and the potential advantages of CFD over other methods. For example, CFD can overcome the difficulties of nonlinear problems faced in theoretical studies, and it is normally more cost-efficient than physical experiments. For these reasons, the CFD method has been prevalently used to investigate different types of marine hydrodynamics problems such as the ship resistance, propeller performance, ship self-propulsion performance, seakeeping and maneuverability as well as the tidal turbine performance.

This Special Issue, therefore, comprises 24 original articles from both academia and industry that advance state-of-the-art CFD applications in marine hydrodynamics or review the progress and future directions of research in this field. The published articles cover a wide range of subjects relevant to naval architecture and ocean engineering, including but not limited to; ship resistance and propulsion, seakeeping and maneuverability, hydrodynamics of marine renewable energy devices, validation and verification of computational fluid dynamics, EFD/CFD combined methods, fouling/coating hydrodynamics.

> **Yigit Kemal Demirel** *Editor*
