The delta shock wave for a simplified chromatography system is obtained in the Riemann solution when . In fact, the result in this paper is the reasonable generalization of the result in Sun (2011) with which is exactly the critical situation for . The self-similar viscosity vanishing approach is also used to check the delta shock wave solution.
"Viscous Regularization of Delta Shock Wave Solution for a Simplified Chromatography System." Abstr. Appl. Anal. 2013 1 - 10, 2013. https://doi.org/10.1155/2013/893465