REACTION FRONT DYNAMICS OF A+B-]C WITH INITIALLY SEPARATED REACTANTS

We study the reaction front for the diffusion-reaction system A + B --> C with initially separated reactants. We present analytical results for the form of the front and the exponents that characterize its width and height asymptotically, which appear to hold in d greater-than-or-equal-to 2. We also present analytical and numerical results for the form of the reaction front for the ID case in which one of the reactants is static, and find the width exponent alpha = 1 /4, which is larger than the mean field exponent (alpha = 1/6) but smaller than the value for the case in which both species diffuse (alpha congruent-to 0.3).