The suspension of small particles from flat surfaces is recognized as a source of pollution and a potential hazard to exposed humans. The interaction of air flow over a particle in contact with a flat surface was studied. Parameters that affect the air flow-particle-surface interaction were taken into consideration and conditions that would lead to particle lift-off were identified. The results showed that particles 100 nm in size will lift-off from the surface for separation distances greater than 20 nm. A mapping strategy is proposed that could be used to minimize the suspension of small particles if the particle size and separation distances are known.
Lift-Off Behavior of Micro and Nanoparticles in Contact With a Flat Surface
Contributed by the Fluids Engineering Division of ASME for publication in the Journal of Fluids Engineering. Manuscript received July 23, 2012; final manuscript received May 12, 2013; published online August 7, 2013. Assoc. Editor: Prashanta Dutta.
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Rivera, J. L., Sutherland, J. W., and Allen, J. S. (August 7, 2013). "Lift-Off Behavior of Micro and Nanoparticles in Contact With a Flat Surface." ASME. J. Fluids Eng. October 2013; 135(10): 101205. https://doi.org/10.1115/1.4024563
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