Browsing by Author "Reich, Gerhard"

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    Fluid flow and heat transfer in an axially rotating pipe. 2, Effect of rotation on laminar pipe flow
    (1989) Reich, Gerhard; Weigand, Bernhard; Beer, Hans
    The effects of tube rotation on the velocity and temperature distribution, on the friction coefficient and on the heat transfer to a fluid flowing laminar inside a tube are examined by analysis. It is demonstrated that the rotation has a destabilizing effect on a laminar pipe flow, which changes to turbulent flow. Free convection vortices, that occur, if the pipe wall is heated, disappear with a growing rotation velocity of tbe tube. For that purpose a perturbation calculation is performed. By the results of this calculation the disappearance of the free convection vortices is demonstrated evidently.