Delta shock wave interactions via wave front tracking method

Details Delta shock wave interactions via wave front tracking method Delta shock wave interactions via wave front tracking method

2009-12-23

arxiv.org/abs/0912.4636v1

Mathematics

Analysis of PDEs

25 pages, 16 figures, 4 tables

Scientific paper

In this paper we discuss delta shock interaction problem for a pressureless gas dynamics system with two different ways of approaching the subject. The first one is by using shadow wave solution concept. The result of two delta shock interactions is delta shock with non-constant speed in a general case. The second one is by perturbing the system with a small pressure term. The obtained perturbed system is strictly hyperbolic and its Riemann problem is solvable. We compare a limit of a numerical wave front tracking results as small pressure term vanishes with the shadow wave solution. Key words: weighted shadow waves, delta shock waves, wave front tracking, Riemann problem, interactions

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