Abstract
The classical single-fiber theory has been widely used in the fiber filtration field. In order to study the behavior of droplets on fiber surface under the mechanisms (collision, interception), the process of a fiber intercepting a droplet was simplified to a droplet impacting a cylinder, which was simulated by LAMMPS. Variable diameter amorphous fibers with four contact angles were established, and the regime of impinging from spreading to break up was studied with the Reynolds number ranging from 1.17 to 11.69. The results showed that the spreading factor increases with the decrease of contact angle and the increase of fiber diameter. When the projection of the impact location deviates from the fiber center, the droplet spreading factor gradually decreases. The criterion of breakup was established by using Newton's second law based on the maximum spreading factor model, which well predicts compared to the results obtained in molecular dynamic simulations.
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