ON THE ASYMPTOTIC STRUCTURE OF STEADY STOKES AND NAVIER-STOKES FLOWS AROUND A ROTATING TWO-DIMENSIONAL BODY

Toshiaki Hishida*, Mads Kyed

*この研究の対応する著者

研究成果: Article査読

抄録

We establish pointwise decay estimates for the velocity field of a steady twodimensional Stokes flow around a rotating body via a new approach rather than analysis adopted in the previous literature. The novelty is to analyze the singular behavior of the constants in these estimates with respect to the angular velocity of the body, where such singularity is reasonable since they cannot hold in the absence of rotation. We then employ the estimates to identify the asymptotic structure at infinity of a steady scale-critical Navier-Stokes flow, assumed to be small, around a rotating body. It is proved that the leading term is given by a self-similar Navier-Stokes flow which exhibits a circular profile x1 /|x |2 and whose coefficient is the torque acting on the body.

本文言語English
ページ(範囲)89-109
ページ数21
ジャーナルPacific Journal of Mathematics
315
1
DOI
出版ステータスPublished - 2021

ASJC Scopus subject areas

  • 数学 (全般)

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