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arXiv 1701.05697math.AP
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无角截断Boltzmann方程的高阶近似

High order approximation for the Boltzmann equation without angular cutoff

Ling-Bing He, Yulong Zhou

摘要:

为了数值求解玻尔兹曼方程,本文提出了一个新的模型方程来近似无角截断的玻尔兹曼方程。这里的近似方程结合了玻尔兹曼碰撞算子与角截断和朗道碰撞算子。作为第一步,我们证明了我们的近似方程的适定性理论。然后在下一步中,我们显示近似方程的解与原始方程之间的误差估计。与标准的角截断近似方法相比,该方法具有更高的精度。

英文摘要:

In order to solve the Boltzmann equation numerically, in the present work, we propose a new model equation to approximate the Boltzmann equation without angular cutoff. Here the approximate equation incorporates Boltzmann collision operator with angular cut-off and the Landau collision operator. As a first step, we prove the well-posedness theory for our approximate equation. Then in the next step we show the error estimate between the solutions to the approximate equation and the original equation. Compared to the standard angular cut-off approximation method, our method results in higher order of accuracy.

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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