The width of Liesegang bands: A study using moving boundary model and simulation |
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Authors: | SHIBI THOMAS GEORGE VARGHESE ISTVÁN LAGZI |
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Institution: | 1.Department of Physics,University of Calicut,Malappuram,India;2.Department of Meteorology,E?tv?s University,Budapest,Hungary;3.Department of Chemical and Biological Engineering,Northwestern University,Evanston,USA |
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Abstract: | The pattern formation in reaction–diffusion systems was studied by invoking the provisions contained in the moving boundary
model. The model claims that the phase separation mechanism is responsible for separating the colloidal phase of precipitants
into band and non-band regions. The relation between the band separation and its width are invariably related to the concentration
of the reacting components. It was observed that this model provides critical condition for the band formation in semi-idealized
diffusion systems. An algorithm for generating the band structure was designed, and the simulated pattern shows a close resemblance
with the experimentally observed ones. |
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