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arXiv 2201.10843math.NAcs.NA
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非定常斯托克斯方程的适定一阶系统最小二乘解

A well-posed First Order System Least Squares formulation of the instationary Stokes equations

Gregor Gantner, Rob Stevenson

摘要:

本文构造了带滑移边界条件的非定常不可压斯托克斯方程的一阶时空联立最小二乘方程。由于这种适定性,最小化的速度,压力和应力张量的有限元空间的任何协调三元组给出了一个准最佳逼近从该三元组。该配方是实用的意义上,所有的最小二乘功能的规范可以有效地评估。作为最小二乘类型,制定了一个有效的和可靠的后验误差估计。此外,推导出了先验误差估计,并给出了数值结果。

英文摘要:

In this paper, a well-posed simultaneous space-time First Order System Least Squares formulation is constructed of the instationary incompressible Stokes equations with slip boundary conditions. As a consequence of this well-posedness, the minimization over any conforming triple of finite element spaces for velocities, pressure and stress tensor gives a quasi-best approximation from that triple. The formulation is practical in the sense that all norms in the least squares functional can be efficiently evaluated. Being of least squares type, the formulation comes with an efficient and reliable a posteriori error estimator. In addition, a priori error estimates are derived, and numerical results are presented.

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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