Short-time self-diffusion of nearly hard spheres at an oil-water interface

Citation:

Peng, Y. ; Chen, W. ; Fischer, T. M. ; Weitz, D. A. ; Tong, P. Short-time self-diffusion of nearly hard spheres at an oil-water interface. Journal of Fluid Mechanics 2009, 618, 243-261. Copy at http://www.tinyurl.com/lkf88gn
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Abstract:

Optical microscopy and multi-particle tracking are used to study hydrodynamic interactions of monodisperse polymethylmethacrylate (PMMA) spheres at a decalin-water interface. The short-time self-diffusion coefficient measured at low surface coverage has the form D(S)(S)(n) = alpha D(0)(1 - beta n), where n is the area fraction Occupied by the particles, and Do is the Stokes-Einstein diffusion coefficient in the bulk suspension of PMMA spheres in decalin. The measured values of a are found to be in good agreement with the numerical calculation for the drag coefficient of interfacial particles. The measured values of P differ from that obtained for bulk suspensions, indicating that hydrodynamic interactions between the particles have interesting new features at the interface.

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Times Cited: 15

Last updated on 04/15/2014