arXiv subjects

Yusuke Ishigaki

Publications and source records attributed to Yusuke Ishigaki.

3 recordsLinked to original sources

arXiv2025

Local energy decay of solutions to the linearized compressible viscoelastic system around motionless state in an exterior domain

We study the large time behavior of solutions to the system of equations describing motion of compressible viscoelastic fluids. We focus on the linearized system around a motionless state in a three-dimensional exterior domain and derive the local energy decay estimate of its solution to give the diffusion wave phenomena caused by sound wave viscous diffusion and elastic shear wave.

math.AP↗

arXiv2021

On $L^1$ estimates of solutions of compressible viscoelastic system

We consider the large time behavior of solutions of compressible viscoelastic system around a motionless state in a three-dimensional whole space. We show that if the initial preturbation belongs to $W^{2,1}$, and is sufficiently small in $H^4\cap L^1$, the solutions grow in time at the same rate as $t^{\frac{1}{2}}$ in $L^1$ due to diffusion wave phenomena of the system caused by interaction between sound wave, viscous diffusion and elastic wave.

math.AP↗

arXiv2020

Diffusion wave phenomena and $L^p$ decay estimates of solutions of compressible viscoelastic system

We consider the system of equations describing motion of compressible viscoelastic fluids in a whole space. We investigate the large time behavior of solutions around a motionless state, and obtain the $L^p$ decay estimates of solutions for $1<p\leq\infty$, provided that the initial data is sufficiently close to the motionless state. In addition, we clarify the diffusion wave phenomena caused by the sound wave and the elastic shear wave.

math.AP↗