### The perturbed Riemann problem for a balance law

#### Abstract

We study the asymptotic behaviour of the bounded solutions of a hyperbolic conservation law with source term $$\partial_t u(x,t)+ \partial_x f(u(x,t)) =g(u(x,t)),\quad x\in\mathbb{R},t\geq 0,$$ where the flux $f$ is convex and the source term $g$ has simple zeros. We assume that the initial value coincides outside a compact set with an initial value of Riemann type. We prove that the solutions converge in general to a sequence of travelling waves delimited by two shock waves. Some of the travelling waves are smooth and connect two consecutive zeros of the source term, while the remaining are discontinuous and oscillate around an unstable zero of the source. However, we prove that for a generic class of initial data the asymptotic profile contains only travelling waves of the first type. We also analyze the rate of convergence of the solutions to the asymptotic profile.

#### Article information

Source
Adv. Differential Equations, Volume 2, Number 5 (1997), 779-810.

Dates
First available in Project Euclid: 22 April 2013

Mathematical Reviews number (MathSciNet)
MR1751427

Zentralblatt MATH identifier
1023.35520

Subjects
Primary: 35L65: Conservation laws
Secondary: 35B40: Asymptotic behavior of solutions

#### Citation

Mascia, Corrado; Sinestrari, Carlo. The perturbed Riemann problem for a balance law. Adv. Differential Equations 2 (1997), no. 5, 779--810. https://projecteuclid.org/euclid.ade/1366638966