A computational Preston tube method to determine local wall friction forces is presented, which unlike the conventional Preston tube method offers a greater scope of application. The method is based on measuring the dynamic pressures of wall-Pitot tubes of different diameters and determining the local wall shear stress by applying a mathematical boundary-layer law to the flow velocities corresponding to the measured dynamic pressures. The method is verified experimentally in a laminar-turbulent transition flow of a flat plate, in a pipe entrance flow, in a turbulent pipe flow with sudden enlargement, in strongly non-adiabatic turbulent boundary-layer flows and in turbulent boundary-layer flows with adverse pressure gradient. Refs.
CITATION STYLE
Nitsche, W., Thuenker, R., & Haberland, C. (1985). COMPUTATIONAL PRESTON TUBE METHOD. (pp. 261–276). Springer-Verlag. https://doi.org/10.1007/978-3-642-69996-2_21
Mendeley helps you to discover research relevant for your work.