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Paper detail

New Coupling Conditions for Isentropic Flow on Networks

We introduce new coupling conditions for isentropic flow on networks based on an artificial density at the junction. The new coupling conditions can be derived from a kinetic model by imposing a condition on energy dissipation. Existence and uniqueness of solutions to the generalized Riemann and Cauchy problem are proven. The result for the generalized Riemann problem is globally in state space. Furthermore, non-increasing energy at the junction and a maximum principle are proven. A numerical example is given in which the new conditions are the only known conditions leading to the physically correct wave types. The approach generalizes to full gas dynamics.

preprint2020arXivOpen access
Yannick HolleMichael HertyMichael Westdickenberg
math.AP
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Yannick HolleMichael HertyMichael Westdickenberg

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