Diffusion in Turbulent Pipe Flow Using a Stochastic Model.
Bibliographic Information
- Other Title
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- Diffusion in Turbulent Pipe Flow Using
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Abstract
A generalized Langevin equation developed by Haworth and Pope [Phys. Fluids, 29-2 (1986), 387] is applied to calculate the dispersion of a passive contaminant in turbulent pipe flow. The model coefficients in the equation are determined from an algebraic relation based on the consistency condition for the second-order moments of velocity, which includes the third-order moments. In the present model, the first-and second-order moments are used as input data, but the third-order moments are not inputted due to lack of reliable data. First, we confirmed numerically the consistency condition for a simulated velocity field. Second, the long-time diffusion was examined. The Eulerian velocity statistics show good agreement with the prescribed data up to second order. With regard to long-time diffusion, the longitudinal distributions of a cross-sectional mean concentration agree well with experiments. It is also found that the appropriate value for the Kolmogorov constant Co is 1.9 for this problem.
Journal
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- JSME International Journal Series B
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JSME International Journal Series B 39 (4), 667-675, 1996
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390001204672988416
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- NII Article ID
- 130004003584
- 110002981394
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- NII Book ID
- AA10888815
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- BIBCODE
- 1996JSMEB..39..667S
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- ISSN
- 13475371
- 13408054
- http://id.crossref.org/issn/13408054
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- NDL BIB ID
- 4080116
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed