Search Results - "Hoffmann, Marko"

Validation of 4D flow cardiovascular magnetic resonance in TIPS stent grafts using a 3D-printed flow phantom by Riedel, Christoph, Ristow, Inka, Lenz, Alexander, Schoennagel, Bjoern P., Hoffmann, Marko, Piecha, Felix, Adam, Gerhard, Reeder, Scott B., Bannas, Peter

“…Four-dimensional (4D) flow cardiovascular magnetic resonance (CMR) is feasible for portal blood flow evaluation after placement of transjugular intrahepatic…”
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Introduction of novel characteristic time quantities to describe chemical reactors by Weiland, Christian, Salli, Mustafa, Fitschen, Jürgen, Hoffmann, Marko, Schlüter, Michael

“…•The concentration field in a stirred tank reactor is simulated.•Two novel quantities to characterise chemical reactors are presented.•The Mean Distribution…”
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Computational study of three-dimensional Lagrangian transport and mixing in a stirred tank reactor by Weiland, Christian, Steuwe, Eike, Fitschen, Jürgen, Hoffmann, Marko, Schlüter, Michael, Padberg-Gehle, Kathrin, von Kameke, Alexandra

“…•The transient flow inside a 3L stirred tank reactor is computed.•Finite Time Lyapunov Exponent fields inside the three-dimensional reactor are…”
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Characterization Data for the Establishment of Scale-Up and Process Transfer Strategies between Stainless Steel and Single-Use Bioreactors by Bernemann, Vincent, Fitschen, Jürgen, Leupold, Marco, Scheibenbogen, Karl-Heinz, Maly, Marc, Hoffmann, Marko, Wucherpfennig, Thomas, Schlüter, Michael

“…The reliable transfer of bioprocesses from single-use bioreactors (SUBs) of different scales to conventional stainless steel stirred-tank bioreactors is of…”
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Experimental Characterisation and Field Experience of a Reusable, Modified Polyurethane Foam for the Mechanical Clean-Up of Oil Spills on the Sea Surface by Niehaus, Daniel, Hofmann, Sebastian, Kumar, Srividya Bairamangala, Hoffmann, Marko, Cisneros-Aguirre, Jesús, Schlüter, Michael

“…Oil spills at sea, such as the Deepwater Horizon incident in 2010, are devastating environmental hazards, especially for biodiversity in the maritime…”
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Electrical Capacitance Volume Tomography (ECVT) for Characterization of Additively Manufactured Lattice Structures (AMLS) in Gas-Liquid Systems by Spille, Claas, Tholan, Vaishakh Prasannan, Straiton, Benjamin, Johannsen, Monika, Hoffmann, Marko, Marashdeh, Qussai, Schlüter, Michael

“…Against the background of current and future global challenges, such as climate change, process engineering requires increasingly specific solutions adapted to…”
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A Novel Approach for Visualizing Mixing Phenomena of Reactive Liquid-Liquid Flows in Milli- and Micro-Channels by Frey, Torben, Kexel, Felix, Dittmer, Kayla Reata, Bohne, Sven, Hoffmann, Marko, Trieu, Hoc Khiem, Schlüter, Michael

“…Modular milli- and micro-structured systems represent a promising approach to exploit the potential of micro-process technology, including precise reaction…”
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Bubble size and bubble velocity distribution in bubble columns under industrial conditions by Bothe, Melanie, Christlieb, Marc‐Andreas, Hoffmann, Marko, Tedjasukmana, Osmond, Michaux, Frank, Rollbusch, Philipp, Becker, Marc, Schlüter, Michael

“…Bubble column reactors are widely used in many industrial applications due to their simplicity and safety of operation. Despite these advantages, the design…”
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Experimental Analysis of a Bubble Wake Influenced by a Vortex Street by Rüttinger, Sophie, Hoffmann, Marko, Schlüter, Michael

“…Bubble column reactors are ubiquitous in engineering processes. They are used in waste water treatment, as well as in the chemical, pharmaceutical, biological…”
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Lagrangian sensors in a stirred tank reactor: Comparing trajectories from 4D-Particle Tracking Velocimetry and Lattice-Boltzmann simulations by Hofmann, Sebastian, Weiland, Christian, Fitschen, Jürgen, von Kameke, Alexandra, Hoffmann, Marko, Schlüter, Michael

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CFD-Based Compartment Modeling of Continuous Polymer Reactors in Milli-Structured Apparatuses by Use of the Mean Age Theory by Schwarz, Sebastian, Frey, Torben, Hoffmann, Marko, Grünewald, Marcus, Schlüter, Michael

“…The transformation of energy-intensive batch processes for small-scale polymer specialties into more energy-efficient continuous processes is a challenging…”
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Micro-PIV analysis of gas–liquid Taylor flow in a vertical oriented square shaped fluidic channel by Meyer, Christoph, Hoffmann, Marko, Schlüter, Michael

“…•A special injection valve with an extraordinary compensation pipe is tailored.•Importance of refractive index matching for accurate μPIV observations.•μPIV…”
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Optimization of a split and recombine micromixer by improved exploitation of secondary flows by Hermann, Pascal, Timmermann, Jens, Hoffmann, Marko, Schlüter, Michael, Hofmann, Christian, Löb, Patrick, Ziegenbalg, Dirk

“…•Development of a validated CFD simulation for a Split and Recombine micromixer.•μLIF-measurements for validation of the CFD simulation.•Thorough optimization…”
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Experimental investigation of liquid–liquid mixing in T-shaped micro-mixers using μ -LIF and μ -PIV by Hoffmann, Marko, Schlüter, Michael, Räbiger, Norbert

“…Microreaction engineering enables new strategies in process intensification, e.g. reactions with high selectivity, through exploitation of the smallest scales…”
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Influence of Bubble Bouncing on Mass Transfer and Chemical Reaction by Timmermann, Jens, Hoffmann, Marko, Schlüter, Michael

“…The hydrodynamics of bubbly flows is dominated by bubble‐induced turbulence and bubble‐bubble interactions. Both phenomena influence the gas‐liquid mass…”
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Four-dimensional Flow MRI-based Computational Fluid Dynamics Simulation for Noninvasive Portosystemic Pressure Gradient Assessment in Patients with Cirrhosis and Transjugular Intrahepatic Portosystemic Shunt by Riedel, Christoph, Hoffmann, Marko, Ismahil, Muhammad, Lenz, Alexander, Piecha, Felix, Ristow, Inka, Kluwe, Johannes, Schlüter, Michael, Adam, Gerhard, Schoennagel, Bjoern P, Reeder, Scott B, Bannas, Peter

“…Background Transjugular intrahepatic portosystemic shunt (TIPS) dysfunction in patients with liver cirrhosis and recurrent symptoms of portal hypertension is…”
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How Do Vortex Structures Influence Boundary Layer Dynamics in Gas‐Liquid Systems? by Rüttinger, Sophie, Hoffmann, Marko, Schlüter, Michael

“…In many process engineering applications, the dynamics of gas‐liquid two‐phase flows plays a crucial role. The transfer of mass from the gaseous phase into the…”
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Local analysis of micro mixing for the Villermaux-Dushman protocol by using the imaging UV-Vis spectroscopy by Frey, Torben, Kexel, Felix, Grabellus, Markus, Le, Xuan My, Hoffmann, Marko, Herbstritt, Frank, Grünewald, Marcus, Schlüter, Michael

“…The Villermaux-Dushman protocol with UV-Vis analytics is an established tool to characterize the global micro mixing performance in process equipment. The…”
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Experimental analysis of lifelines in a 15,000 L bioreactor by means of Lagrangian Sensor Particles by Hofmann, Sebastian, Buntkiel, Lukas, Rautenbach, Ryan, Gaugler, Lena, Ma, Yifan, Haase, Ingrid, Fitschen, Jürgen, Wucherpfennig, Thomas, Reinecke, Sebastian Felix, Hoffmann, Marko, Takors, Ralf, Hampel, Uwe, Schlüter, Michael

“…This study employs Lagrangian Sensor Particles (LSPs) with a diameter of 40 mm equipped with a pressure sensor to investigate cell lifelines in a 15,000L…”
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SMART‐Reactors: Tailoring Gas Holdup Distribution by Additively Manufactured Lattice Structures by Spille, Claas, Lyberis, Anastasios, Maiwald, Maria Isabelle, Herzog, Dirk, Hoffmann, Marko, Emmelmann, Claus, Schlüter, Michael

“…In chemical process engineering, fast gas‐liquid reactions often suffer from an inefficient distribution of gas and therefore mixing and mass transfer…”
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