Particle Removal and Damage Thresholds from Particle Removal and Damage Formation Frequency for High-Velocity-Aerosol Cleaning

Particle removal without damage addition remains a grand challenge. Particle removal and damage addition are macroscopic effects of the cleaning technique. In order to improve the understanding of cleaning techniques like high-velocity-aerosol cleaning, these macroscopic properties need to be linked to the fundamental properties of the technique like its spray characteristics. Here we show that using the particle removal or damage addition frequency, we can estimate the fraction of droplets contributing either to particle removal or damage addition. We find that only a very small fraction of the droplets leads to damage formation. We also show that for particle removal only a very small fraction of droplets is needed, or the droplets only need to clean a very small surface area. The fraction of droplets contributing to particle removal depends on the effective area used to analyze the particle removal frequency.