Effect of velocity fluctuations length on the calculation accuracy of turbulent shearing stresses
This article focuses on the method of improving shear stresses calculation accuracy based on the experimental data. It was proven that shear stresses value considerably changes (even up to change of sign from positive to negative) depending on different velocity fluctuations amount (or length). Expe...
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| Format: | Article |
| Language: | English |
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Moscow State University of Civil Engineering (MGSU)
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| Series: | Vestnik MGSU |
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| Online Access: | http://vestnikmgsu.ru/files/archive/issues/2014/9/ru/10.pdf |
| Summary: | This article focuses on the method of improving shear stresses calculation accuracy based on the experimental data. It was proven that shear stresses value considerably changes (even up to change of sign from positive to negative) depending on different velocity fluctuations amount (or length). Experimental database consists of velocity in turbulent flow at different times. Recommendations for practical use of methods of calculation depending on the type of engineering problems are presented. The method of finding optimal amount of the experimental database is proposed by the analysis of the values convergence of the standard deviations calculated for the whole sample and the standard deviation calculated by increasing interval. The calculation results for these intervals are at the points of the measuring system and the hypothesis about finding the optimal length of implementation is offered. The steps for further research are set out. |
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| ISSN: | 1997-0935 |