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We study the limiting behavior of systems of hyperbolic conservation laws with stiff relaxation terms. Reduced systems, inviscid and viscous local conservation laws, and weakly nonlinear limits are derived through asymptotic expansions. An entropy condition is introduced for N × N systems that ensures the hyperbolicity of the reduced inviscid system. The… (More)

- Gui-Qiang Chen, David Levermore, Tai-Ping Liu, Comm Pure, Appl Math
- 1992

We study the limiting behavior of systems of hyperbolic conservation laws with stii relaxation terms. Reduced systems, inviscid and viscous local conservation laws, and weakly nonlinear limits are derived through asymptotic expansions. An entropy condition is introduced for N N systems that ensures the hyperbolicity of the reduced inviscid system. The… (More)

Let u t + f(u) x = 0 be a strictly hyperbolic n n system of conservation laws, each characteristic eld being linearly degenerate or genuinely nonlinear. In this paper we explicitly deene a functional = (u; v), equivalent to the L 1 distance, which is \almost decreasing" i.e. ? u(t); v(t) ? ? u(s); v(s) O(") (t ? s) for all t > s 0; for every couple of… (More)

For the Broadwell model of the nonlinear Boltzmann equation, there are shock profile solutions, i.e. smooth traveling waves that connect two equilibrium states. For weak shock waves, we prove asymptotic (in time) stability with respect to small perturbations of the initial data. Following the work of Liu [7] on shock wave stability for viscous conservation… (More)

We show that the weak detonation waves for a combustion model of Rosales-Majda are nonlinearly stable. Because of the strongly non-linear nature of the wave, usual stability analysis of weakly nonlinear nature does not apply. The chemical switch on-oo is the main feature of nonlinearity. In particular, the propagation of the wave depends sensitively on the… (More)

- Joel Smoller, Tai-Ping Liu
- 2005

To Tai-Ping Liu on the occasion of his sixtieth birthday. Abstract We give a mathematically rigorous exposition of the flatness problem , and show how Guth's original model of inflation is used to resolve it.

We consider the problem of 2D supersonic flow onto a solid wedge, or equivalently in a concave corner formed by two solid walls. For mild corners, there are two possible steady state solutions, one with a strong and one with a weak shock emanating from the corner. The weak shock is observed in supersonic flights. A long-standing natural conjecture is that… (More)

- Tai-Ping Liu, Zhouping Xin
- 2005

It is shown that expansion waves for the compressible Navier-Stokes equations are nonlinearly stable. The expansion waves are constructed for the compressible Euler equations based on the inviscid Burgers equation. Our result shows that Navier-Stokes equations and Euler equations are time-asymptotically equivalent on the level of expansion waves. The result… (More)

We show that the continuum shock prooles for dissipative diierence schemes constructed in Part I are nonlinearly stable. It is shown rst that the prooles have the conservation property, obtained as the limit of the discrete version for prooles with nearby rational, quasi-Diophantine speeds. This allows us to formulate anti-diierencing of the schemes and to… (More)

We consider self-similar potential flow for compressible gas with polytropic pressure law. Self-similar solutions arise as large-time asymptotes of general solutions, and as exact solutions of many important special cases like Mach reflection, multidimen-sional Riemann problems, or flow around corners. Self-similar potential flow is a quasilinear… (More)