Admissible wave fans in nonlinear hyperbolic systems (Q919537)

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scientific article; zbMATH DE number 4161256
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English
Admissible wave fans in nonlinear hyperbolic systems
scientific article; zbMATH DE number 4161256

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    Admissible wave fans in nonlinear hyperbolic systems (English)
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    1989
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    The quasi-linear hyperbolic system \[ \partial_ tU(x,t)+\partial_ xF(U(x,t))=0 \] is investigated. The author describes several well known conditions for admissible shock waves and wave fans (i.e. solutions U(x,t) of the form \(U(x,t)=V(x/t)).\) The main object of the paper is the discussion of the entropy rate admissibility criterion for wave fans, which was introduced by the author [J. Differ. Equations 14, 202-212 (1973; Zbl 0262.35038)]. In particular, it is shown that the entropy condition implies the admissibility criterion of Liu for wave fans of moderate strength.
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    quasi-linear hyperbolic system
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    shock waves
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    wave fans
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    entropy rate admissibility
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