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Characteristic Analysis of Exponential Compact Higher Order Schemes for Convection-Diffusion Equations
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作者 Y.V.S.S. Sanyasiraju Nachiketa Mishra 《American Journal of Computational Mathematics》 2011年第2期39-54,共16页
This paper looks at the development of a class of Exponential Compact Higher Order (ECHO) schemes and attempts to comprehend their behaviour by introducing different combinations of discrete source function and its de... This paper looks at the development of a class of Exponential Compact Higher Order (ECHO) schemes and attempts to comprehend their behaviour by introducing different combinations of discrete source function and its derivatives. The characteristic analysis is performed for one-dimensional schemes to understand the efficiency of the scheme and a similar analysis has been introduced for higher dimensional schemes. Finally, the developed schemes are used to solve several example problems and compared the error norms and rates of convergence. 展开更多
关键词 EXPONENTIAL scheme compact higher order scheme Characteristics Resolving Efficiency Finite DIFFERENCE
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奇性方腔黏性流动的完全高精度紧致差分方法 被引量:1
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作者 王晓峰 袁合才 《河南师范大学学报(自然科学版)》 CAS CSCD 北大核心 2012年第6期14-18,22,共6页
以涡量流函数形式的Navier-Stokes(N-S)方程为例,详细介绍了构造完全高精度紧致差分格式的一般方法.所建立的高精度差分格式,无论是在计算区域的内点还是在边界点上均可以达到4阶精度,且具有紧致性,与已有数值实验结果相比只需要用很少... 以涡量流函数形式的Navier-Stokes(N-S)方程为例,详细介绍了构造完全高精度紧致差分格式的一般方法.所建立的高精度差分格式,无论是在计算区域的内点还是在边界点上均可以达到4阶精度,且具有紧致性,与已有数值实验结果相比只需要用很少的网格(61×61)就可以求得较高计算精度的数值解,从而大大节省了计算时间,提高了计算效率. 展开更多
关键词 奇性方腔 完全高精度 紧致差分格式 伪时间导数
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