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Numerical error control for second-order explicit TVD scheme with limiters in advection simulation

机译:平流模拟中带限幅器的二阶显式TVD方案的数值误差控制

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This paper analyzes the causes of the numerical errors in terms of numerical diffusion and compression arising from the use of explicit second-order total variation diminishing (TVD) schemes in one-dimensional advection simulation. It demonstrates that different TVD limiters may have very different performances in different advection simulations, because of the so-called numerical diffusion and compression. The accuracy of the computed results is found to depend on not only the limiter functions themselves but also the advection features such as the concentration distribution, advection velocity and time step, etc. According to such relations, the effective ranges of the MIN_MOD, Van Leer and SUPERBEE limiters are characterized by introducing a dimensionless parameter which reflects the key features of advections, aiming to provide an approach to select a proper TVD limiter in advection simulation. (C) 2015 Elsevier Ltd. All rights reserved.
机译:本文从一维对流模拟中使用显式二阶总变化量递减(TVD)方案引起的数值扩散和压缩方面分析了数值误差的原因。它表明,由于所谓的数值扩散和压缩,不同的TVD限制器在不同的对流模拟中可能具有非常不同的性能。发现计算结果的准确性不仅取决于限制器函数本身,还取决于对流特征,例如浓度分布,对流速度和时间步长等。根据这种关系,MIN_MOD,Van Leer的有效范围SUPERBEE限制器的特点是引入了反映对流关键特征的无量纲参数,旨在提供一种在对流模拟中选择合适的TVD限制器的方法。 (C)2015 Elsevier Ltd.保留所有权利。

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