The characteristics of turbulence in curved pipes under highly pulsatile flow conditions

Authors: Kalpakli Vester, A., Örlü, R., Tillmark, N.T., Alfredsson, P.H.
Document Type: Conference
Pubstate: Published
Journal: Progress in Turbulence V, Springer Proceedings in Physics, Proceedings of the iTi Conference in Turbulence 2012
Volume: 149   183-187
Year: 2014


High speed stereoscopic particle image velocimetry has been employed to provide unique data from a steady and highly pulsatile turbulent flow at the exit of a 90 degree pipe bend. Both the unsteady behaviour of the Dean cells under steady conditions, the so called “swirl switching” phenomenon, as well as the secondary flow under pulsations have been reconstructed through proper orthogonal decomposition. The present data set constitutes – to the authors’ knowledge – the first detailed investigation of a turbulent, pulsatile flow through a pipe bend.