Khaware, AlokAlokKhawareGupta, Vinay KumarVinay KumarGuptaPunekar, HemantHemantPunekarSharkey, PatrickPatrickSharkey2021-03-082021-03-082019-0911th International Workshop on Ship and Marine Hydrodynamics (IWSH2019), Paper 49http://hdl.handle.net/11420/9022Marine systems need to be designed for performance and safety. Numerical simulations are extensively used to aid this design process. These simulations involve complexities associated with free surface flow modelling along with moving bodies. To overcome some limitations of the traditional dynamic mesh approach, in the present work overset mesh approach has been employed, which provides ease of mesh generation and modelling of mesh motion. Two common marine hydrodynamic problems are simulated using the Volume of Fluid method (VOF) and overset approach. The first problem focuses on the dynamic response of a container ship at open sea. Accurate prediction of the ship response to the wave plays an important role as it may add resistance altering the speed of the ship or may compromise the structural integrity. The steady-state free surface simulation around the KRISO container ship (KCS) hull is performed where water elevation on the ship and resistance coefficient are validated against experiment. Transient simulation is performed on full-scale KCS hull model where ship interaction with the head wave is captured using a 5th order Stokes wave theory and six-degree of freedom solver. The heave and pitch motion of the ship is validated against the published data. The second problem focuses on the launching of a lifeboat in the calm water. The lifeboat gets high acceleration due to free fall and the impact point during water entry becomes an important consideration for the safety of passengers. Injury potential of an occupant is directly linked with the acceleration ratio of the boat and the maximum limiting values are recommended by the International Maritime Organization (IMO). Transient simulation for the lifeboat launching is performed where acceleration and boat motion profile are studied in detail.enhttp://rightsstatements.org/vocab/InC/1.0/Computational Fluid Dynamics (CFD)KCS hull simulationLifeboat launchOverset meshTechnikConference Paper10.15480/882.334810.15480/882.3348Fluiddynamik und Schiffstheorie M-8Other