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arXiv 1205.0907math.AP
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退化对流-扩散方程差分逼近的L1误差估计

L1 Error Estimates for Difference Approximations Of Degenerate Convection-Diffusion Equations

Kenneth H. Karlsen, Nils Henrik Risebro, Erlend B. Storrøsten

摘要:

研究了一维强退化对流-扩散方程的单调差分格式.这些非线性方程在一类(不连续)熵解中是适定的。我们证明了近似解和唯一熵解之间的L1差是由一个常数乘以空间离散化参数的立方根上界。

英文摘要:

We analyze monotone difference schemes for strongly degenerate convection-diffusion equations in one spatial dimension. These nonlinear equations are well-posed within a class of (discontinuous) entropy solutions. We prove that the L1 difference between the approximate solutions and the unique entropy solution is bounded above by a constant times the cube root of the spatial discretization parameter.

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