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Classification of the Riemann problem for compressible two-dimensional Euler system in non-ideal gas. (English) Zbl 1394.35342

Summary: This work is devoted to the study of two-dimensional Riemann problem modeled by compressible Euler system for the non-ideal gas. The initial constant data are divided in four quadrants in such a way that only one planar elementary wave connects two neighboring states. We classify the different combinations of planar elementary waves and subsequently discuss one by one using the method of generalized characteristic analysis. Attention is drawn to the changes in elementary waves, with regard to their shape, speed and strength, under the influence of the van der Waals parameter \(b\). It has been shown that only sixteen (respectively, fifteen) distinct combinations of planar elementary waves exist for isentropic (respectively, non-isentropic) non-ideal gas flows.

MSC:

35Q31 Euler equations
76N15 Gas dynamics (general theory)
76L05 Shock waves and blast waves in fluid mechanics
76P05 Rarefied gas flows, Boltzmann equation in fluid mechanics
Full Text: DOI

References:

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