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Although its accuracy is of the 4th order, the optimal scheme enjoys a high resolution and at the same time preserves the characteristics of the group velocity. The numerical calculations show that the maximum resolvable wavenumbers obtained with the optimal compact difference (interpolation) scheme is 0.86π (0.63π). The group velocity can be preserved for the wavenumber less than 0.75π. All these values are better than those obtained from the standard compact schemes of fourth or sixth order. Finally, the optimal scheme, the standard fourth order compact scheme and the sixth order compact schemes are employed to calculate the first derivation and the propagations of small scale waves. The results show that the optimal scheme is superior to other two schemes with respect to the reduction of errors and the preservation of the group velocity., authors=LIU Xiao, LI Yifan, LI Wenqiang, WANG Zhenhua, authorsList=LIU Xiao;LI Yifan;LI Wenqiang;WANG Zhenhua, authorCompany=College of Mathematics and Information Science, Henan Normal University, Xinxiang 453007, Henan Province, China, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=/Yk6q5i8h1X1vLXxcAMKjw==, pdfFileSize=1894754, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1242128957621994406, articleId=1242128952991486254, tenantId=1146029695717560320, journalId=1146031591421210625, language=CN, title=三对角四阶跳点紧致格式优化和初步应用, columnId=1146540929516700224, journalTitle=科技导报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=根据修正波数应在充分大的波数范围内接近准确波数的思想,构造了优化的3对角4阶跳点紧致差分格式及插值格式.优化跳点紧致格式仍然具有4阶精度,但提高了分辨率,能够在更大的波数范围内保持群速度特性.通过实验数据表明,优化跳点紧致差分格式的分辨率可达到0.86π,优化紧致插值格式可达0.63π,可较好保持群速度的最大波数为0.75π,均大于标准4阶和6阶跳点紧致格式.分别用优化格式,标准4阶和6阶跳点紧致格式计算小尺度波动的性能,结果表明优化格式在模拟小尺度波动,在减小计算误差并保持群速度方面具有明显优势., authors=刘晓, 李一帆, 李文强, 王贞化, authorsList=刘晓;李一帆;李文强;王贞化, authorCompany=河南师范大学数学与信息科学学院,河南新乡 453007, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=gjTBDbAsAXlQxXuWwTXJKQ==, pdfFileSize=1894754, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null)}, authors=null, 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科技导报
| 研究论文 2012, 30(16): 66-70
三对角四阶跳点紧致格式优化和初步应用
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刘晓, 李一帆, 李文强, 王贞化
作者信息
河南师范大学数学与信息科学学院,河南新乡 453007
An Optimized Fourth-order Staggered Tridiagonal Compact Scheme and Its Applications
Affiliations
出版时间: 2012-06-08
doi: 10.3981/j.issn.1000-7857.2012.16.009
文章导航
根据修正波数应在充分大的波数范围内接近准确波数的思想,构造了优化的3对角4阶跳点紧致差分格式及插值格式.优化跳点紧致格式仍然具有4阶精度,但提高了分辨率,能够在更大的波数范围内保持群速度特性.通过实验数据表明,优化跳点紧致差分格式的分辨率可达到0.86π,优化紧致插值格式可达0.63π,可较好保持群速度的最大波数为0.75π,均大于标准4阶和6阶跳点紧致格式.分别用优化格式,标准4阶和6阶跳点紧致格式计算小尺度波动的性能,结果表明优化格式在模拟小尺度波动,在减小计算误差并保持群速度方面具有明显优势.
Based on the idea that the modified wavenumbers should be as close to the exact wavenumbers as possible, an optimal tridiagonal fourth-order compact difference scheme and an interpolation scheme on the staggered grid system are proposed in this paper. Although its accuracy is of the 4th order, the optimal scheme enjoys a high resolution and at the same time preserves the characteristics of the group velocity. The numerical calculations show that the maximum resolvable wavenumbers obtained with the optimal compact difference (interpolation) scheme is 0.86π (0.63π). The group velocity can be preserved for the wavenumber less than 0.75π. All these values are better than those obtained from the standard compact schemes of fourth or sixth order. Finally, the optimal scheme, the standard fourth order compact scheme and the sixth order compact schemes are employed to calculate the first derivation and the propagations of small scale waves. The results show that the optimal scheme is superior to other two schemes with respect to the reduction of errors and the preservation of the group velocity.
staggered grids
/
compact scheme
/
high resolution
/
group velocity
刘晓;李一帆;李文强;王贞化.
三对角四阶跳点紧致格式优化和初步应用.
科技导报,
2012
, 30
(16)
: 66
-70
.
DOI: 10.3981/j.issn.1000-7857.2012.16.009
LIU Xiao;LI Yifan;LI Wenqiang;WANG Zhenhua.
An Optimized Fourth-order Staggered Tridiagonal Compact Scheme and Its Applications[J].
Science & Technology Review ,
2012
, 30
(16)
: 66
-70
.
DOI: 10.3981/j.issn.1000-7857.2012.16.009
2012年第30卷第16期
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doi: 10.3981/j.issn.1000-7857.2012.16.009
接收时间:2012-04-20
首发时间:2012-06-08
出版时间:2012-06-08
收稿日期:2012-04-20
修回日期:2012-05-21
https://castjournals.cast.org.cn/joweb/kjdb/CN/10.3981/j.issn.1000-7857.2012.16.009
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2种不同金属材料的力学参数
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