Summary
The effect of both single and tandem plate manipulators on developing pipe flow has been investigated both experimentally and computationally. Numerical calculations have been performed for nearly developed flow using a finite- volume, elliptic, low-Re turbulence model code. The results are compared with measured wall pressure, mean velocity, and turbulence intensity profiles, as well as earlier computational results for similar devices mounted in the initial developing flow region. The numerical results agree closely with experiment and both suggest that nett drag reduction may only be possible in the fully developed case and over a longer development length behind a more optimum tandem configuration than could be considered in the present studies. Further calculations are now being performed to examine this latter possibility prior to any further experimental investigations.
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Pollard, A., Thomann, H., Savill, A.M. (1990). Manipulation and Modelling of Turbulent Pipe Flow: Some Parametric Studies of Single and Tandem Ring Devices. In: Coustols, E. (eds) Turbulence Control by Passive Means. Fluid Mechanics and its Applications, vol 4. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2159-7_2
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DOI: https://doi.org/10.1007/978-94-009-2159-7_2
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