• P A Varughese

      Articles written in Pramana – Journal of Physics

    • Rhythmic pattern formations in gels and Matalon—Packter law: A fresh perspective

      Jacob George Issac Paul P A Varughese George Varghese

      More Details Abstract Fulltext PDF

      The periodic precipitation pattern formation in gelatinous media is interpreted as a moving boundary problem. The time law, spacing law and width law are revisited on the basis of the new scenario. The explicit dependence of the geometric structure on the initial concentrations of the reactants is derived. Matalon—Packter law, which relates the spacing coefficient with the initial concentrations is reformulated removing many ambiguities and impractical parameters. Experimental results are discussed to establish the significance of moving boundary concept in the diffusion controlled pattern forming systems

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