We revisit the problem of pinning a reaction-diffusion front by defect, in particular reaction-free region. Using collective variables for and numerical simulations, we compare behaviors bistable monostable front. A can be pinned as confirmed criterion, analysis time independant simulations. Conversely, never pinned, it gives rise to secondary pulse past defect calculate this takes appear. Thes...

The kinetic of the heterogeneous chemical reaction of aluminum hydroxide and fluosilicic acid was studied. It was found that the diffusion of the reactants through the porous silica coating to the aluminum hydroxide surface and the interfacial chemical reaction between the diffusing reactant and aluminum hydroxide platelets control the overall reaction rate. These two phenomena were studied...

In this paper, we study the diffusion approximation for singularly perturbed stochastic reaction-diffusion equation with a fast oscillating term. The asymptotic limit original system is obtained, where an extra Gaussian term appears. Such explicitly given in terms of solution Poisson Hilbert space. Moreover, also obtain rate convergence, and convergence shown not to depend on regularity coeffic...