Heiko Pietruske

TL;DR: The evolution of the structure of a gas-liquid flow in a large vertical pipe of 195 mm inner diameter was investigated at the TOPFLOW test facility in Rossendorf as discussed by the authors.

TL;DR: In this paper, two types of wire-mesh sensors are used for high-speed visualization of a gas-liquid flow as well as for the measurement of void fraction profiles, bubble size distributions and gas velocity distributions.

TL;DR: In this paper, an experimental investigation on the air/water counter-current two-phase flow in a horizontal rectangular channel connected to an inclined riser has been conducted, where a high-speed camera in the bended region of the hot leg, delivering a detailed view of the stratified interface as well as of dispersed structures like bubbles and droplets.

TL;DR: The TOPFLOW (TwO Phase FLOW) test facility at Forschungszentrum Rossendorf as discussed by the authors is a multipurpose thermal-hydraulic test facility for the investigation of generic and applied steady state and transient two phase flow phenomena and the development and validation of models of Computational Fluid Dynamic (CFD) codes.

TL;DR: In this paper, the 3D void field is scanned with a stationary wire-mesh sensor that supplies data with a spatial resolution of 3mm over the cross-section and a measuring frequency of 2.5mm.