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From view point of operation and maintenance, it is a very important issue to survey durability of salt corrosion of coastal structures. Although accurate prediction of quantity of sea spray which attaches surface of coastal structures, the generation process of sea spray when waves attack the structures such as a pier and a sea wall has not been known yet. In this study, conditions of sea spray generation which waves dashing against a vertical wall were found out by laboratory experiments and numerical simulation. Although it is known that the Weber number takes part in the generating mechanism of sea spray, the Ursell number might be used as one of the conditions of sea spray generation. It was re-understood well the most predominant factor as the condition of sea spray generation was the collision velocity of water to a vertical wall.

Fundamental Study on Conditions of Sea Spray Generation when Waves Dashing against a Vertical Wall