Lax convergence theorems and error estimates of a finite element method for the incompressible Euler system
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866914437247533056 |
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| author | Lukáčová-Medviďová, Mária She, Bangwei |
| author_facet | Lukáčová-Medviďová, Mária She, Bangwei |
| contents | In this paper, we present convergence theorems for numerical solutions of the incompressible Euler equations. The first result is the Lax-Wendroff-type theorem, while the second can be formulated in the framework of the Lax equivalence theorem. To illustrate their application, we study a finite element method that uses a pair of $RT_0/P_0$ elements to approximate the velocity and pressure, respectively. Applying the concept of the relative energy, we derive the convergence rates of our numerical method using two different approaches. Finally, we validate the theoretical convergence results through numerical experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_00783 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Lax convergence theorems and error estimates of a finite element method for the incompressible Euler system Lukáčová-Medviďová, Mária She, Bangwei Numerical Analysis In this paper, we present convergence theorems for numerical solutions of the incompressible Euler equations. The first result is the Lax-Wendroff-type theorem, while the second can be formulated in the framework of the Lax equivalence theorem. To illustrate their application, we study a finite element method that uses a pair of $RT_0/P_0$ elements to approximate the velocity and pressure, respectively. Applying the concept of the relative energy, we derive the convergence rates of our numerical method using two different approaches. Finally, we validate the theoretical convergence results through numerical experiments. |
| title | Lax convergence theorems and error estimates of a finite element method for the incompressible Euler system |
| topic | Numerical Analysis |
| url | https://arxiv.org/abs/2604.00783 |