Triple decomposition of a fluctuating velocity field in a multiscale flowetc15 Tracking Number 176 Presentation: Session: Jets and Wakes 1 Room: Room E Session start: 10:30 Tue 25 Aug 2015 Pawel Baj p.baj@imperial.ac.uk Affifliation: Imperial College Paul J.K. Bruce p.bruce@imperial.ac.uk Affifliation: Imperial College Oliver R.H. Buxton o.buxton@imperial.ac.uk Affifliation: Imperial College Topics: - Transport and mixing, - Jets and wakes Abstract: A method for the triple decomposition of fluctuating velocity in a multiscale flow, suitable for a spatiotemporal data set, is presented. It is applied to experimental data gathered by means of particle image velocimetry (PIV). The basic properties of the decomposed parts are shown. The presented method is then used to perform a conditional study on the residual transverse velocity fluctuations. It was found that phase locking occurs between the stochastic fluctuations embedded in the wakes of different bars, appearing after the wakes have merged. |