非协调谱元方法中傅里叶级数的精确计算
Exact calculation of Fourier series in nonconforming spectral-element methods
AI总结:
提出一种方法,基于多维非协调谱元上的节点值,精确计算全局傅里叶级数系数,且不引入超过计算机舍入误差的额外近似。
摘要:
本文提出一种方法,给定多维非协调谱元上的节点值,用于计算全局傅里叶级数系数。该方法是“精确的”,即给定谱元方法(SEM)固有的近似,不会引入超过计算机舍入误差的进一步近似。当SEM已生成空间函数的自适应网格表示,且需要检查其全局傅里叶谱时(例如在动态自适应流体动力学模拟中),该方法非常有用。
英文摘要:
In this note is presented a method, given nodal values on multidimensional nonconforming spectral elements, for calculating global Fourier-series coefficients. This method is ``exact'' in that given the approximation inherent in the spectral-element method (SEM), no further approximation is introduced that exceeds computer round-off error. The method is very useful when the SEM has yielded an adaptive-mesh representation of a spatial function whose global Fourier spectrum must be examined, e.g., in dynamically adaptive fluid-dynamics simulations.
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。