Mixing and consequently fluid dynamic is a key parameter to tailor the particle size distribution (PSD) in nanoparticle precipitation. Due to fast and intensive mixing a static T-mixer configuration is capable for synthesizing continuously nanoparticles. The flow and concentration field of the applied mixer is investigated experimentally at different flow rates by Particle Image Velocimetry (PIV) and Laser Induced Fluorescence (LIF). Due to the PIV measurements the flow field in the mixer was characterized qualitatively and the mixing process itself is quantified by the subsequent LIF-measurements. A special feature of the LIF set up is to detect structures in the flow field, which are smaller than the Batchelor length. Thereby a detailed insight into the mixing process in a static T-Mixer is given. In this study a CFD-based approach using Direct Numerical Simulation (DNS) in combination with the solid formation kinetics solving population balance equations (PBE) is applied, using barium sulfate as modeling material. A Lagrangian Particle Tracking strategy is used to couple the flow field information with a micro mixing model and with the classical theory of nucleation. We found that the DNS-PBE approach including macro and micro mixing, combined with the population balance is capable of predicting the full PSD in nanoparticle precipitation for different operating parameters. Additionally to the resulting PSD, this approach delivers a 3D-information about all running subprocesses in the mixer, i.e. supersaturation built-up or nucleation, which is visualized for different process variables.
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ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering
July 17–20, 2006
Miami, Florida, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-4750-0
PROCEEDINGS PAPER
Nanoparticle Precipitation in a T-Mixer: Coupling Experimental and Numerical Investigations of the Fluid Dynamics With the Solid Formation Processes Available to Purchase
Johannes Gradl,
Johannes Gradl
Friedrich-Alexander University of Erlangen-Nuremberg, Nuremberg, Germany
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Florian Schwertfirm,
Florian Schwertfirm
Technische Universita¨t Mu¨nchen, Munich, Germany
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Hans-Christoph Schwarzer,
Hans-Christoph Schwarzer
Su¨d-Chemie AG
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Hans-Joachim Schmid,
Hans-Joachim Schmid
Friedrich-Alexander University of Erlangen-Nuremberg, Nuremberg, Germany
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Michael Manhart,
Michael Manhart
Technische Universita¨t Mu¨nchen, Munich, Germany
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Wolfgang Peukert
Wolfgang Peukert
Friedrich-Alexander University of Erlangen-Nuremberg, Nuremberg, Germany
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Johannes Gradl
Friedrich-Alexander University of Erlangen-Nuremberg, Nuremberg, Germany
Florian Schwertfirm
Technische Universita¨t Mu¨nchen, Munich, Germany
Hans-Christoph Schwarzer
Su¨d-Chemie AG
Hans-Joachim Schmid
Friedrich-Alexander University of Erlangen-Nuremberg, Nuremberg, Germany
Michael Manhart
Technische Universita¨t Mu¨nchen, Munich, Germany
Wolfgang Peukert
Friedrich-Alexander University of Erlangen-Nuremberg, Nuremberg, Germany
Paper No:
FEDSM2006-98092, pp. 1063-1070; 8 pages
Published Online:
September 5, 2008
Citation
Gradl, J, Schwertfirm, F, Schwarzer, H, Schmid, H, Manhart, M, & Peukert, W. "Nanoparticle Precipitation in a T-Mixer: Coupling Experimental and Numerical Investigations of the Fluid Dynamics With the Solid Formation Processes." Proceedings of the ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. Volume 1: Symposia, Parts A and B. Miami, Florida, USA. July 17–20, 2006. pp. 1063-1070. ASME. https://doi.org/10.1115/FEDSM2006-98092
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