Wave focusing is one of the mechanisms that results in the generation of extreme waves. The accurate numerical simulation of the interaction between the focusing wave with a fixed vertical cylinder is presented in this paper, and the simulation is conducted using the naoe-FOAM-SJTU solver, an in-house CFD solver for marine hydrodynamics. The generation of focusing wave is realized by the provided movement of the wavemaker, and the propagation of the wave is validated in advance. The wave elevations and the pressures around the cylinder are provided and compared with the experiment.

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