Non-Contact Surface Sampling - Particle-Surface Interaction in the Boundary Layer

Current methods of surface sampling require consumables, limited sample areas, and are susceptible to sample collection variability and poor collection efficiency. Non-contact sampling systems can suffer from poor sample liberation. Understanding the basic surface sampling principles in complex environmental and operational scenarios is essential for the design of non-contact systems. The main difficulty of particle liberation from the surface is the jet’s inability to penetrate surface boundary layers (viscous sublayer), transfer momentum (via drag force) to particles, and overcome adhesion forces. Our research includes numerical and experimental studies aimed at understanding particle-surface interaction in presence of flow over the surface.

 

References

  1. Ryan Keedy, Evan Dengler, Peter Ariessohn, Igor Novosselov, Alberto Aliseda, Removal Rates of Explosive Particles from Surfaces by Impingement of a Gas Jet, Aerosol Science and Technology, v 46, n 2, p 148-155, 2012. 
  2. Igor V Novosselov, Peter C Ariessohn, Evan D Dengler, Michelle Hickner: Particle interrogation devices and methods. US Patent 8307723, 11/13/2012
  3. Igor V Novosselov, Peter C Ariessohn, Evan D Dengler, Michelle Hickner: Particle interrogation devices and methods. US Patent 8561486, 10/22/2013