# American Institute of Mathematical Sciences

March  2018, 17(2): 391-411. doi: 10.3934/cpaa.2018022

## The asymptotic limits of solutions to the Riemann problem for the scaled Leroux system

 1 School of Mathematics and Statistics Science, Ludong University, Yantai 264025, China 2 Department of Mathematics, Shanghai University, Shanghai 200444, China 3 School of Mathematics and Statistics Science, Ludong University, Yantai 264025, China

* Corresponding author: Chun Shen.

Received  June 2017 Revised  August 2017 Published  March 2018

Fund Project: Chun Shen is supported by NSFC (11441002) and Shandong Provincial Natural Science Foundation (ZR2014AM024), Wancheng Sheng is supported by NSFC (11371240) and Meina Sun is supported by NSFC (11271176).

The Riemann problem for the scaled Leroux system is considered. It is proven rigorously that the Riemann solutions for the scaled Leroux system converge to the corresponding ones for a non-strictly hyperbolic system of conservation laws when the perturbation parameter tends to zero. In addition, some interesting phenomena are displayed in the limiting process, such as the formation of delta shock wave and a rarefaction (or shock) wave degenerates to be a contact discontinuity.

Citation: Chun Shen, Wancheng Sheng, Meina Sun. The asymptotic limits of solutions to the Riemann problem for the scaled Leroux system. Communications on Pure & Applied Analysis, 2018, 17 (2) : 391-411. doi: 10.3934/cpaa.2018022
##### References:
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show all references

##### References:
 [1] Y. Brenier and E. Grenier, Sticky particles and scalar conservation laws, SIAM J. Numer. Anal., 35 (1998), 2317-2328.   Google Scholar [2] E. Canon, On some hyperbolic systems of temple class, Nonlinear Anal. TMA, 75 (2012), 4241-4250.   Google Scholar [3] G. Q. Chen and H. Liu, Formation of $δ$-shocks and vacuum states in the vanishing pressure limit of solutions to the Euler equations for isentropic fluids, SIAM J. Math. Anal., 34 (2003), 925-938.   Google Scholar [4] G. Q. Chen and H. Liu, Concentration and cavition in the vanishing pressure limit of solutions to the Euler equations for nonisentropic fluids, Physica D, 189 (2004), 141-165.   Google Scholar [5] Z. Cheng, On the application of kinetic formulation of the Le roux system, Proceedings of the Edinburgh Mathematical Society, 52 (2009), 263-272.   Google Scholar [6] G. Dal Maso, P. G. LeFloch and F. Murat, Definition and weak stability of nonconservative products, J. Math. Pures. Appl., 74 (1995), 483-548.   Google Scholar [7] V. G. Danilov and D. Mitrovic, Delta shock wave formation in the case of triangular hyperbolic system of conservation laws, J. Differential Equations, 245 (2008), 3704-3734.   Google Scholar [8] V. G. Danilov and V. M. Shelkovich, Dynamics of propagation and interaction of δ-shock waves in conservation law systems, J. Differential Equations, 221 (2005), 333-381.   Google Scholar [9] J. Fritz and B. Toth, Derivation of Leroux system as the hydrodynamic limit of a two-component lattice gas, Comm. Math. Phys., 249 (2004), 1-27.   Google Scholar [10] T. Gramchev, Entropy solutions to conservation laws with singular initial data, Nonlinear Anal. TMA, 24 (1995), 721-733.   Google Scholar [11] F. Huang, Weak solution to pressureless type system, Comm. Partial Differential Equations, 30 (2005), 283-304.   Google Scholar [12] F. Huang and Z. Wang, Well-posedness for pressureless flow, Comm. Math. Phys., 222 (2001), 117-146.   Google Scholar [13] P. Ji and C. Shen, Construction of the global solutions to the perturbed Riemann problem for the Leroux system, Advance in Mathematical Physics, 2016 (2016), 4808610, 13 pages.  Google Scholar [14] H. Kalisch and D. Mitrovic, Singular solutions of a fully nonlinear $2×2$ system of conservation laws, Proceedings of the Edinburgh Mathematical Society, 55 (2012), 711-729.   Google Scholar [15] H. Kalisch and D. Mitrovic, Singular solutions for the shallow-water equations, IMA J. Appl. Math., 77 (2012), 340-350.   Google Scholar [16] B. L. Keyfitz and H. C. Kranzer, Spaces of weighted measures for conservaion laws with singular shock solutions, J. Differential Equations, 118 (1995), 420-451.   Google Scholar [17] A. Y. Leroux, Approximation des systems hyperboliques, in "Cours et Seminaires INRIA, problemes hyperboliques", Rocquencourt, 1981. Google Scholar [18] J. Li, Note on the compressible Euler equations with zero temperature, Appl. Math. Lett., 14 (2001), 519-523.   Google Scholar [19] J. Li, T. Zhang and S. Yang, The Two-Dimensional Riemann Problem in Gas Dynamics, Pitman Monographs and Surveys in Pure and Applied Mathematics, Vol. 98, New York: Longman Scientific and Technical, 1998.  Google Scholar [20] Y. G. Lu, Global entropy solutions of Cauchy problem for the Le Roux system, Appl. Math. Lett., 60 (2016), 61-66.   Google Scholar [21] Y. G. Lu, I. Mantilla and L. Rendon, Convergence of approximated solutions to a nonstrictly hyperbolic system, Adv. Nonlin. Studies, 1 (2001), 65-79.   Google Scholar [22] D. Mitrovic and M. Nedeljkov, Delta-shock waves as a limit of shock waves, J. Hyperbolic Differential Equations, 4 (2007), 629-653.   Google Scholar [23] M. Nedeljkov, Shadow waves: entropies and interactions for delta and singular shocks, Arch. Rational Mech. Anal., 197 (2010), 487-537.   Google Scholar [24] V. Popkov and G. M. Schutz, Why spontaneous symmetry breaking disappeas in a bridge system with PDE-friendly boundaries, J. Stat. Mech. , 12 (2004), p12004. Google Scholar [25] D. Serre, Solutions á variations bornées pour certains systémes hyperboliques de lois de conservation, J. Differential Equations, 68 (1987), 137-168.   Google Scholar [26] D. Serre, Systems of Conservation Laws 1/2, Cambridge Univ. Press, Cambridge, 1999/2000.  Google Scholar [27] M. Sever, Distribution solutions of nonlinear systems of conservation laws, Mem. Amer. Math. Soc., 190(N889) (2007), 1-163.   Google Scholar [28] C. Shen, The Riemann problem for the Chaplygin gas equations with a source term, Z. Angew. Math. Mech., 96 (2016), 681-695.   Google Scholar [29] C. Shen and M. Sun, Formation of delta shocks and vacuum states in the vanishing pressure limit of Riemann solutions to the perturbed Aw-Rascle model, J. Differential Equations, 249 (2010), 3024-3051.   Google Scholar [30] W. Sheng and T. Zhang, The Riemann problem for the transportation equations in gas dynamics, Mem. Amer. Math. Soc., 137(N654) (1999), 1-77.   Google Scholar [31] M. Sun, Singular solutions to the Riemann problem for a macroscopic production model, Z. Angew. Math. Mech., 97 (2017), 916-931.   Google Scholar [32] D. Tan, T. Zhang and Y. Zheng, Delta-shock waves as limits of vanishing viscosity for hyperbolic systems of conservation laws, J. Differential Equations, 112 (1994), 1-32.   Google Scholar [33] B. Temple, Systems of conservation laws with invariant submanifolds, Trans. Amer. Math. Soc., 280 (1983), 781-795.   Google Scholar [34] B. Toth and B. Valko, Perturbation of singular equilibria of hyperbolic two-component systems: a universal hydrodynamic limit, Comm. Math. Phys., 256 (2005), 111-157.   Google Scholar [35] A. I. Volpert, The space $BV$ and quasilinear equations, Math. USSR Sb., 2 (1967), 225-267.   Google Scholar [36] H. Yang and J. Wang, Delta-shocks and vacuum states in the vanishing pressure limit of solutions to the isentropic Euler equations for modified Chaplygin gas, J. Math. Anal. Appl., 413 (2014), 800-820.   Google Scholar [37] H. Yang and Y. Zhang, New developments of delta shock waves and its applications in systems of conservation laws, J. Differential Equations, 252 (2012), 5951-5993.   Google Scholar [38] G. Yin and W. Sheng, Delta shocks and vacuum states in vanishing pressure limits of solutions to the relativistic Euler equations for polytropic gases, J. Math. Anal. Appl., 355 (2009), 594-605.   Google Scholar
The phase plane for the scaled Leroux system (1.2) when $u_{-}<0$, left for $\varepsilon>0$ and right for the limit $\varepsilon\rightarrow0$ situation.
The phase plane for the scaled Leroux system (1.2) when $u_{-}>0$, left for $\varepsilon>0$ and right for the limit $\varepsilon\rightarrow0$ situation.
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