npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041


Research Paper

New Physics: Sae Mulli 2010; 60: 1224-1229

Published online November 30, 2010

Copyright © New Physics: Sae Mulli.

Experiment Involving a Fluctuating Interface in Homogeneous Media

Na Ri JUNG1, Hyun-Joo KIM1*, Yeon-Mu CHOI2

1Department of Physics Education, Korea National University of Education, Cheongwon 363-791
2Bangmok College of Basic Studies, Myongji University, Yongin 449-728



The dynamic scaling behavior of a growing self-affine fractal interface is examined by using a simple experiment with two glass plates. We put one glass plate on the other and immerse the edge of the two up plates in a black-ink dye solution; then, the evolution of the interface formed between the ink solution and the air by capillary action is photographed with a CCD camera as a function of time. We found that the interface width scaled with system size L as W(L) ~ L αwith α? 0.48 and scale with time as W(t ) ~ βwith β? 0.37. These results of this experiment demonstrate that interface roughening belongs to the Kardar-Parisi-Zhang universality class. Thus, the theoretical results for surface growth in random noise are confirmed by the experiment.

Keywords: Experiment of fluctuating interface, Surface growth, Power law, Universality class

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