TY - GEN
T1 - Modeling of particles dispersion on liquid surfaces
AU - Gurupatham, Sathishkumar
AU - Dalal, Bhavin
AU - Nudurupati, Sai
AU - Fischer, Ian
AU - Singh, Pushpendra
AU - Joseph, Daniel D.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - When small particles (e.g., flour, pollen, etc.) come in contact with a liquid surface, they immediately disperse. The dispersion can occur so quickly that it appears explosive, especially for small particles on the surface of mobile liquids like water. This explosive-like dispersion is the consequence of capillary forces pulling particles into the interface causing them to accelerate to a relatively large velocity. The maximum velocity increases with decreasing particle size; for nanometer-sized particles (e.g., viruses and proteins), the velocity on an air-water interface can be as large as 47 m/s. We also show that particles oscillate at a relatively-high frequency about their floating equilibrium before coming to stop under viscous drag. The observed dispersion is a result of strong repulsive hydrodynamic forces that arise because of these oscillations.
AB - When small particles (e.g., flour, pollen, etc.) come in contact with a liquid surface, they immediately disperse. The dispersion can occur so quickly that it appears explosive, especially for small particles on the surface of mobile liquids like water. This explosive-like dispersion is the consequence of capillary forces pulling particles into the interface causing them to accelerate to a relatively large velocity. The maximum velocity increases with decreasing particle size; for nanometer-sized particles (e.g., viruses and proteins), the velocity on an air-water interface can be as large as 47 m/s. We also show that particles oscillate at a relatively-high frequency about their floating equilibrium before coming to stop under viscous drag. The observed dispersion is a result of strong repulsive hydrodynamic forces that arise because of these oscillations.
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U2 - 10.1115/FEDSM-ICNMM2010-30555
DO - 10.1115/FEDSM-ICNMM2010-30555
M3 - Conference contribution
AN - SCOPUS:80054982516
SN - 9780791849484
T3 - American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
SP - 1429
EP - 1432
BT - ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010
T2 - ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting, FEDSM 2010 Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
Y2 - 1 August 2010 through 5 August 2010
ER -