6Marine icing phenomena are strongly dependent on the rate of water impact on marine vessels. The most 7 important component is wave-impact sea spray. There is limited understanding of droplet size and 8 velocity distributions of wave-impact sea spray. Initial distributions of size and velocity of droplets are 9 crucial for the calculation of the droplet path and consequently for determining the water impact on 10 surfaces. This paper develops a new model of wave-impact sea spray by using a distribution of the size 11 and velocity of droplets at the edge of the vessel. The concepts of water-sheet breakup and droplet 12 breakup lead to an inverse dependence between the size and velocity of droplets after the breakup 13 process. Droplets take different paths and form a spray cloud in front of the vessel. The liquid water 14 content in front of the vessel can be calculated by considering the arrangement, sizes, and velocities of a 15 set of droplets in the spray cloud. The response of the droplet trajectory model to various initial conditions 16 with different sets of droplet sizes and velocities is examined. The numerical results are compared to real 17 data from field observations. Droplet sizes are inversely proportional to droplet velocities, as verified by 18 liquid water content data obtained by the field observations. This paper proposes the use of this inverse 19 relationship based on physics of the breakup process, as the initial data for calculating the wave-impact 20 sea spray trajectory in front of a vessel. 21
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