دانلود رایگان مقاله غبار آب رنگ شده پراکنده به صورت التراسونیک به عنوان جایگزین برای پودر رنگی پراکنده

Abstract

Colored powders such as colored corn starch are used in events such as The Color Run to blanket the air and surroundings with decorative color. Their use, however, presents a risk of dust explosion. The fact that such powders are used at events drawing large crowds makes any fire or explosion likely to result in a mass casualty incident. For instance, the Formosa Fun Coast explosion on June 27, 2015, resulted in multiple deaths and injuries. Development of alternatives to flammable/explosive colored powders would eliminate this hazard. We demonstrate as a proof-of-concept that an ultrasonically driven water mist can produce effects similar to those created by colored powders. Food coloring was dissolved in water, and the colored water was subsequently dispersed from various ultrasonic devices and photographed. Colored clouds were formed from the colored water. Colored clouds were visible under various conditions, and color combinations were possible. Possible risks of colored corn starch and water mists are discussed. An ultrasonic misting system is capable of safely replacing colored powders with regard to appearance.

5. Conclusions and future research

Dyed water produced by dissolving food colorings into water, can be dispersed using ultrasonically-based nebulizers. Such devices produce colored mists, which create an effect similar to that produced by colored powders while avoiding dust explosion hazards. Wind presence causes dispersal of mist, and presumably requires additional mist generation to overcome. Further work is required to optimize nebulizer based mist production and to characterize optical properties of generated mists given various parameters such as dye concentration, mist particle size and velocity, and volume of water dispensed.