Global existence and Blow-up for the 1D damped compressible Euler equations with time and space dependent perturbation

2022/12/21 by Yuusuke Sugiyama, Sugiyama, Yuusuke
Engineering · Mathematics · #Advanced Mathematical Physics Problems #Analysis of PDEs (math.AP) #Computational Fluid Dynamics and Aerodynamics #FOS: Mathematics #Navier-Stokes equation solutions

paper · pdf · doi:10.48550/arxiv.2212.11072

openalex publication_date 2022/12/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In this paper, we consider the 1D Euler equation with time and space dependent damping term -a(t,x)v. It has long been known that when a(t,x) is a positive constant or 0, the solution exists globally in time or blows up in finite time, respectively. We prove that those results are invariant with respect to time and space dependent perturbations. We suppose that the coefficient a satisfies the following condition |a(t,x)- μ₀| ≤ a₁(t) + a₂ (x), where μ₀ ≥ 0 and a₁ and a₂ are integrable functions with t and x. Under this condition, we show the global existence and the blow-up with small initial data, when μ₀ >0 and μ=0 respectively.

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