Diffusion of Particles in Free-Standing Liquid Films

by: C Cheung, YH Hwang, X-L Wu, HJ Choi

Physical Review Letters, Vol. 76, No. 14. (1 April 1996), 2531.

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摘要

Self-diffusion and relative diffusion of hard spheres are measured in free-standing soap films using video imaging. We found the following: (1) Particle self-diffusion in the film is faster than in the three-dimensional fluid, in quantitative agreement with Saffman's calculation for diffusion in a thin sheet of fluid. (2) For a pair of particles, the average rate of separation between them appears to depend logarithmically on their initial distance. This suggests the presence of long-range hydrodynamic interaction in the film despite viscous damping at the liquid-air interfaces.

@article{citeulike:3014447, abstract = {Self-diffusion and relative diffusion of hard spheres are measured in free-standing soap films using video imaging. We found the following: (1) Particle self-diffusion in the film is faster than in the three-dimensional fluid, in quantitative agreement with Saffman's calculation for diffusion in a thin sheet of fluid. (2) For a pair of particles, the average rate of separation between them appears to depend logarithmically on their initial distance. This suggests the presence of long-range hydrodynamic interaction in the film despite viscous damping at the liquid-air interfaces.}, author = {Cheung, C. and Hwang, Y. H. and Wu, X-L and Choi, H. J. }, citeulike-article-id = {3014447}, doi = {http://dx.doi.org/10.1103/PhysRevLett.76.2531}, journal = {Physical Review Letters}, keywords = {fluid-mechanics, soap-film, two-point}, month = {April}, number = {14}, pages = {2531+}, posted-at = {2008-07-17 15:38:16}, priority = {0}, publisher = {American Physical Society}, title = {Diffusion of Particles in Free-Standing Liquid Films}, url = {http://dx.doi.org/10.1103/PhysRevLett.76.2531}, volume = {76}, year = {1996} }

RIS record

TY - JOUR ID - citeulike:3014447 L3 - citeulike-article-id:3014447 N2 - Self-diffusion and relative diffusion of hard spheres are measured in free-standing soap films using video imaging. We found the following: (1) Particle self-diffusion in the film is faster than in the three-dimensional fluid, in quantitative agreement with Saffman's calculation for diffusion in a thin sheet of fluid. (2) For a pair of particles, the average rate of separation between them appears to depend logarithmically on their initial distance. This suggests the presence of long-range hydrodynamic interaction in the film despite viscous damping at the liquid-air interfaces. IS - 14 JF - Physical Review Letters TI - Diffusion of Particles in Free-Standing Liquid Films PB - American Physical Society VL - 76 SP - 2531 KW - fluid-mechanics KW - soap-film KW - two-point AU - Cheung, C AU - Hwang, YH AU - Wu, X-L AU - Choi, HJ PY - 1996/04/01/ UR - http://dx.doi.org/10.1103/PhysRevLett.76.2531 ER -

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