표면 특성에 따른 항빙결 특성의 확률적 접근

Abstract

The anti-freezing (or anti-frosting) characteristics of bare aluminum and superhydrophobic aluminum surfaces were experimentally investigated. The temperature of sessile droplets placed on the bare and the superhydrophobic surfaces was measured during freezing process with a constant surface temperature. The freezing delay time was defined based on thermodynamic nature of freezing, and measured for a statistically large sample of droplets. The freezing delay times of sessile droplets on both surfaces described a random distribution. This random distribution was re-organized using a cumulative distribution function. With the cumulative distribution, the maximum freezing delay times was calculated for the both surfaces. Based on the maximum freezing delay time, the superhydrophobic surface retarded the freezing of sessile droplets three times longer than the bare surface.