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Difference estimate for weak solutions to the Navier–Stokes equations in a thin spherical shell and on the unit sphere

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  • Tatsu-Hiko Miura

    (Hirosaki University, Graduate School of Science and Technology
    Tokyo Metropolitan University, Graduate School of Science)

Abstract

We consider the Navier–Stokes equations in a three-dimensional thin spherical shell and on the two-dimensional unit sphere, and estimate the difference of weak solutions on the thin spherical shell and the unit sphere. Assuming that the weak solution on the thin spherical shell is a Leray–Hopf weak solution satisfying the energy inequality, we derive difference estimates for the two weak solutions by the weak-strong uniqueness argument. The main idea is to extend the weak solution on the unit sphere properly to an approximate solution on the thin spherical shell, and to use the extension as a strong solution in the weak-strong uniqueness argument.

Suggested Citation

  • Tatsu-Hiko Miura, 2026. "Difference estimate for weak solutions to the Navier–Stokes equations in a thin spherical shell and on the unit sphere," Partial Differential Equations and Applications, Springer, vol. 7(3), pages 1-44, June.
    • Handle: RePEc:spr:pardea:v:7:y:2026:i:3:d:10.1007_s42985-026-00391-0
    DOI: 10.1007/s42985-026-00391-0
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