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Numerical modelling of unsteady turbulent flow in tubes, including the effects of roughness and large changes in Reynolds number


Reference:

Johnston, D. N., 2011. Numerical modelling of unsteady turbulent flow in tubes, including the effects of roughness and large changes in Reynolds number. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 225 (8), pp. 1874-1885.

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    Official URL:

    http://dx.doi.org/10.1177/0954406211400795

    Abstract

    A method has been developed for predicting unsteady turbulent friction in smooth, transitional and rough pipe flow. For transitional and rough pipe flow the effective viscosity at the wall is varied depending on Reynolds number and roughness. An approximation has been made for the transition region by using a cubic spline for the friction factor between the smooth and rough regions. This turbulence model can be implemented readily in several types of numerical model for pipe flow, including simple lumped parameter models, finite difference/finite element methods and the Method of Characteristics. An approximate method for representing changes in turbulence energy is discussed. Using this, the method is suitable for small and large changes in flow, and for short and long time scales, but further validation is needed.

    Details

    Item Type Articles
    CreatorsJohnston, D. N.
    DOI10.1177/0954406211400795
    DepartmentsFaculty of Engineering & Design > Mechanical Engineering
    Research CentresCentre for Power Transmission & Motion Control
    Publisher Statementrevised.pdf: ©SAGE. The definitive version is available as: Johnston, D. N., 2011. Numerical modelling of unsteady turbulent flow in tubes, including the effects of roughness and large changes in Reynolds number. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 225 (8), pp. 1874-1885. http://dx.doi.org/10.1177/0954406211400795
    RefereedYes
    StatusPublished
    ID Code24961

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