offers eligible public information officers paid access to a reliable news release distribution service.Initially, Markus Schubert wants to thoroughly investigate the flows under industry-related conditions in a specific type of chemical apparatus, a bubble column reactor. The chemical industry is the third largest industrial branch of Germany's manufacturing industry.EurekAlert! But what does really happen inside these reactors that have been inaccessible so far because of the opaqueness due to pressure-resistant reactor walls? Dr. Markus Schubert from the Institute of Fluid Dynamics has accomplished all of this. He joined the HZDR in 2007, intermitted by a one-year research sabbatical in Québec/Canada. 2016 AIChE Annual Meeting (ISBN: 978-0 … Below, the experimental setup, sensor specification and procedure to derive the liquid filling level are explained and results are exemplarily shown.filling level normalized to reactor diameterassess the potential of process intensification concepts for enhanced packing utilization and phase contacting,It should be mentioned that for lower inclination angles no stratification of the flow is observed at these high rotational velocities. With the prospective funding from the European Research Council, he wants to set up his own research group which will focus on multiphase chemical reactors and the complex flows occurring inside them. Moreover, the high frame rate needed to visualize highly transient two‐phase flows is not required for the rather steady stratified flow.
Lower thresholds, in turn, assign larger amounts of liquid to the continuous gas phase.intersection angle between interface and inner tubeintersection angle between interface and outer tubederive criteria for the positioning of redistributors to prevent excessive wall flow, dry zones and channeling,abscissa of wire‐mesh crossing pointscustomize packing properties and filling procedures to ensure desired phase fractions and pressure drops,inclined rotating fixed‐bed reactorIn the future the presented modus operandi will be used for a comprehensive analysis of operating conditions (superficial phase velocities, inclination angle and rotational velocity) and reactor design parameters (particle and inner tube diameter) to identify the hydrodynamic process window of the inclined rotating fixed‐bed reactor with inner tube.ordinate of wire‐mesh crossing pointsprovide data for the validation of computational fluid dynamics models.Can't sign in?
Gains and offsets of the post‐amplifiers must be determined prior to the measurements in order to adapt the minimum and maximum of the log‐output signal to the input voltage range of the analog‐to‐digital converters (A/D). In these apparatuses, gas is dispersed in liquid as homogeneously as possible for chemical conversion. is a service of the American Association for the Advancement of Science.Outstanding young European investigators are encouraged to apply for an "ERC Starting Grant" of the European Research Council (ERC). These facilities are also accessible to external users.German researcher gets Starting Grant from the European Research CouncilMarkus Schubert studied process engineering and earned his doctoral degree in this scientific field at the TU Dresden [Dresden University of Technology]. Is the flow adjusted in such a way that the processes run at optimal conditions? There's still a considerable need for research and that's exactly where we want to start our work. The chosen threshold ensures that liquid trapped in the drained part of the catalyst packing is withdrawn from further analysis. "The HZDR has been a member of the Helmholtz Association, Germany's largest research organization, since January 1, 2011.
At the receiver module, the current signal of each wire is converted into an equivalent voltage signal by means of a transimpedance amplifier (I/U). These parameters depend on the individual fixed bed properties, e.g., particle arrangement and porosity.optimize gas‐liquid distributors towards efficient and uniform initial irrigation,Enter your email address below and we will send you your usernameEnter your email address below.unknown capacitance (fluid and parasitic contributors) The WMS technology is an appropriate tool to visualize the liquid flow. E-mail address: m.schubert@hzdr.de), Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany.Search for more papers by this author Higher thresholds lead to significant false (lower) detection of the gas‐liquid interface at virtual crossing points, which are not completely covered by the liquid but still belong to the continuous liquid phase.