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http://hdl.handle.net/2080/327
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| Title: | Removal of Surface Adhered Particles by Surfactants and Fluid Motions |
| Authors: | Batra, Ashish
Paria, S
Manohar, C
Khilar, K C |
| Issue Date: | 2001 |
| Publisher: | Wiley Interscience |
| Citation: | AIChE Journal, Vol 47, Iss 11, P 2557-2565 |
| Abstract: | Remo®ing or detaching particles from a surface is of interest in filter bed regeneration,
cleaning of semiconductor surfaces, migration of fines in underground reser®oirs, and
detergency. A two-stage remo®al process proposed in®ol®es penetration of the surfactant
solution, diffusion and adsorption of surfactant molecules, followed by the particle remo
®al by hydrodynamic force. The particle-substrate system, considered here as a
plate-plate system, takes into account the surface roughness of the substrate in the form
of asperities. The concept of critical hydrodynamic force required to remo®e or detach a
particle adhering to a substrate in the presence of surfactant solution is discussed, as
well as its calculation of typical ®alues. The critical hydrodynamic force depends on the
surface roughness, particle size, and other parameters of the system. When asperity size
is comparable to the equilibrium distance of separation, the critical hydrodynamic force
becomes ®ery large i... |
| Description: | Copyright for this article belongs to Wiley Interscience |
| URI: | http://hdl.handle.net/2080/327 |
| Appears in Collections: | Journal Articles
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| PARIA-aiche-47-11-2001.pdf | | 388Kb | Adobe PDF | View/Open |
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