ONE-DIMENSIONAL IMPULSIVE PSEUDOPARABOLIC EQUATION WITH CONVECTION AND ABSORPTION

We study the initial-boundary value problem for the one-dimensional Oskolkov pseudoparabolic equation of viscoelas-ticity with a nonlinear convective term and a linear absorption term. The absorption term depends on a positive integer parameter n and, as n -> +infinity, converges weakly* to the expression incorporating the Dirac delta function, which models an instant absorption at the initial moment of time. We prove that the infinitesimal initial layer, associated with the Dirac delta function, is formed as n -> +infinity, and that the family of regular weak solutions of the original problem converges to the strong solution of a two-scale microscopic-macroscopic model. The main novelty of the article consists of taking into account of the effect of convection. In the final section, some possible generalizations and applications are briefly discussed, in particular with regard to active fluids.