Comparative Study on the Reynolds Shear Stress in CTAC Drag-Reducing Flow by Experiment and DNS

Wei Guo Gu; De Zhong Wang

doi:10.4028/www.scientific.net/AMR.871.89

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 871Comparative Study on the Reynolds Shear Stress in...

Comparative Study on the Reynolds Shear Stress in CTAC Drag-Reducing Flow by Experiment and DNS

Abstract:

In this paper, both experimental and numerical studies were carried out for fully developed water and CTAC solution channel flows in order to understand the different distribution of Reynolds shear stress appeared in experiments and DNS. Quadrant analysis were carried out according to the categorization of turbulent fluid motions. The studies indicates that the elastic force of the additives' structures will cause the fluids moving back and forth in the wall-normal direction in experiment and the symmetric distribution of Reynolds shear stress in all quadrants. However, Giesekus model in DNS only applies the elastic force inhibiting the transverse fluctuations.

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Periodical:

Advanced Materials Research (Volume 871)

Pages:

89-94

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.871.89

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Online since:

December 2013

Authors:

Wei Guo Gu*, De Zhong Wang

Keywords:

DNS, Drag Reduction, Reynolds Shear Stress, Turbulence Transportation

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