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arXiv 1111.5052math.NAcs.NAnlin.PS
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演化域上反应扩散系统有限元逼近的隐式-显式时间步进

Implicit-explicit timestepping with finite element approximation of reaction-diffusion systems on evolving domains

University of Sussex(萨塞克斯大学)

Omar Lakkis, Anotida Madzvamuse, Chandrasekhar Venkataraman

AI总结:

针对生物模型(如Schnakenberg模型)中的半线性反应扩散系统,提出并分析了一种结合有限元空间逼近的隐式-显式时间步进方法,证明了最优阶误差估计和逐点稳定性结果。

摘要:

我们提出并分析了一种隐式-显式时间步进过程,结合有限元空间逼近,用于演化域上的半线性反应扩散系统,该系统源于生物模型,如Schnakenberg(1979)。我们采用模型方程的拉格朗日公式,该公式允许对固定域上的抛物方程进行误差分析,但引入了技术困难,主要是时空相关的传导和扩散。我们证明了在$\Lp{\infty}(0,T;\Lp{2}(\W))$和$\Lp{2}(0,T;\Hil{1}(\W))$范数下的最优阶误差估计,以及一个逐点稳定性结果。我们指出这些结果适用于欧拉解。提供了拉格朗日和欧拉方案实现的细节。我们还报告了在演化域上图案形成的应用数值实验。

英文摘要:

We present and analyse an implicit-explicit timestepping procedure with finite element spatial approximation for a semilinear reaction-diffusion systems on evolving domains arising from biological models, such as Schnakenberg's (1979). We employ a Lagrangian formulation of the model equations which permits the error analysis for parabolic equations on a fixed domain but introduces technical difficulties, foremost the space-time dependent conductivity and diffusion. We prove optimal-order error estimates in the $\Lp{\infty}(0,T;\Lp{2}(\W))$ and $\Lp{2}(0,T;\Hil{1}(\W))$ norms, and a pointwise stability result. We remark that these apply to Eulerian solutions. Details on the implementation of the Lagrangian and the Eulerian scheme are provided. We also report on a numerical experiment for an application to pattern formation on an evolving domain.

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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