Stability of Degenerate Stationary Waves for Viscous Gases

Yoshihiro Ueda*, Tohru Nakamura, Shuichi Kawashima


研究成果: Article査読

20 被引用数 (Scopus)


This paper is concerned with the asymptotic stability of degenerate stationary waves for viscous gases in the half space. We discuss the following two cases: (1) viscous conservation laws and (2) damped wave equations with nonlinear convection. In each case, we prove that the solution converges to the corresponding degenerate stationary wave at the rate t-α/4 as t → ∞, provided that the initial perturbation is in the weighted space L2α=L2(ℝ+;(1+x)αdx). This convergence rate t-α/4 is weaker than the one for the non-degenerate case and requires the restriction α < α*(q), where α*(q) is the critical value depending only on the degeneracy exponent q. Such a restriction is reasonable because the corresponding linearized operator for viscous conservation laws cannot be dissipative in L2α for α > α *(q) with another critical value α*(q). Our stability analysis is based on the space-time weighted energy method in which the spatial weight is chosen as a function of the degenerate stationary wave.

ジャーナルArchive for Rational Mechanics and Analysis
出版ステータスPublished - 2010 9月 17

ASJC Scopus subject areas

  • 分析
  • 数学(その他)
  • 機械工学


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