Distribution of eddy viscosity and mixing length in smooth tubes
| Autor: | R. R. Rothfus, D. H. Archer, K. G. Sikchi |
|---|---|
| Rok vydání: | 1958 |
| Předmět: |
Environmental Engineering
Chemistry Turbulence General Chemical Engineering Prandtl number Mixing (process engineering) Turbulence modeling Reynolds number Thermodynamics Mechanics Physics::Fluid Dynamics symbols.namesake Mixing length model Mass transfer symbols Turbulent Prandtl number Biotechnology |
| Zdroj: | AIChE Journal. 4:27-32 |
| ISSN: | 1547-5905 0001-1541 |
| DOI: | 10.1002/aic.690040106 |
| Popis: | Profiles of eddy viscosity and Prandtl mixing length in fluids flowing steadily and isothermally in smooth tubes have been calculated from the velocity data of several investigators for Reynolds numbers between 1.2 × 103 and 3.2 × 106. In the transition range unusually high values of eddy viscosity and mixing length are obtained in some portions of the stream. In the fully turbulent range the effect of Reynolds number is small and the mixing length tends toward zero at the center of the tube. The parameters for turbulent flow between parallel plates have been correlated through the concept of an equivalent tube. The results are of importance in designing equipment for heat and mass transfer and mixing. |
| Databáze: | OpenAIRE |
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