Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

Investigation of two- and multiphase flow phenomena inside technical apparatuses and hydraulic components are of highest interest for equipment designers and operators since the knowledge helps to assess and understand complex flows, e.g. in chemical and process engineering. This in turn expedites the development of safer and more efficiently operated industrial facilities. Furthermore, measured data are used to validate new models developed for multiphase computational fluid dynamics (CFD). For non-intrusive two-phase flow investigations, two radiation-based computed tomography (CT) scanners were developed and are operated at the Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Institute of Fluid Dynamics: a high-resolution gamma-ray computed tomography scanner (HireCT) first presented by Hampel et al. (2007) and an ultrafast electron beam X-ray CT scanner (ROFEX) first presented by Fischer et al. (2010). Both CT scanners are able to recover cross-sectional phase distribution images of a scanned plane or volume section within the flow as time averaged images or time resolved image sequences. The capabilities of both CT systems are introduced exemplarily with reference to experiments on an industrial scale bubble column, a fluidized bed and a static mixer.