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arXiv 2408.05077math.AP
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半空间中带 Dirichlet 边界条件的 Hölder 空间内不可压缩 Newton 流体方程弱解的能量守恒

Energy conservation for weak solutions of incompressible Newtonian fluid equations in Hölder spaces with Dirichlet boundary conditions in the half-space

Luigi C. Berselli, Alex Kaltenbach, Michael Ružička

AI总结:

本文研究三维半空间中带齐次 Dirichlet 边界条件的非定常 Navier-Stokes 方程,给出保证 Leray-Hopf 弱解能量守恒的充分 Hölder 连续性条件,且无需边界附近的压力或速度通量假设。

摘要:

我们研究三维非定常 Navier-Stokes 方程的 Leray-Hopf(弱)解在何种充分 Hölder 连续性条件下能够保证能量守恒。我们的重点是带有齐次 Dirichlet 边界条件的半空间情形。与 Cauchy 情形或周期情形相比,该问题在技术上更具挑战性,且此前尚未得到研究。目前,仅有若干次优结果为人所知;这些结果通过 Morrey 嵌入得到,并基于速度梯度在 Sobolev 空间中的条件。此外,本文所得结果在边界附近既不需要对压力作任何额外假设,也不需要对速度通量作任何额外假设。

英文摘要:

We investigate sufficient Hölder continuity conditions on Leray-Hopf (weak) solutions to the in unsteady Navier-Stokes equations in three dimensions guaranteeing energy conservation. Our focus is on the half-space case with homogeneous Dirichlet boundary conditions. This problem is more technically challenging, if compared to the Cauchy or periodic cases, and has not been previously addressed. At present are known a few sub-optimal results obtained through Morrey embedding results based on conditions for the gradient of the velocity in Sobolev spaces. Moreover, the results in this paper are obtained without any additional assumption neither on the pressure nor the flux of the velocity, near to the boundary.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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