Description: |
This project is dedicated to the control of drop size distributions in stirred liquid/liquid dispersions. Dispersed systems are of major importance in chemical, pharmaceutical, mining, petroleum, and food industries. The design of reactors requires usually expensive experimental investigations. Mathematical modelling, model based simulation and control are often the only feasible approach to achieve the technological goals. For the complex process of formation of drop size distributions (DSD) in a stirred tank such mathematical methods are currently not available. The global long-term perspective of the project is to develop model based methods for the prediction of the complex process of DSD formation in stirred liquid/liquid dispersions in a stirred tank. The technological vision is to be able to achieve a desired average drop size and a defined size distribution, using control parameters such as the stirrer speed. To achieve the long-term goals, the research project consists of several major subtasks which will be carried out in a cooperative way between the three partners of the project. These subtasks can be summarized as experiment-based modelling, development, implementation, and application of numerical methods, construction of real-time observers, and development of a robust control method.
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Results: |
The goal of this project is the control of drop size distributions both in the simulation and in the numerical investigation. So far, we have obtained the following results:
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Journal publications: |
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Conference proceedings and posters: |
2011
- Hermann, S.; Maaß, S.; Zedel, D. and Kraume, M.: Experimental and numerical investigations of drop breakage mechanism. 1st International Symposium on Multiscale Multiphase Process Engineering, October 4-10 2011, Kanazawa, Japan.
- Hermann, S.; Erdt, R.; Maaß, S.; Kraume, M.; Untersuchungen zur Steuerung von Tropfengrössenverteilungen. In Vortragssammelband zum 13. Köthener Rührerkolloquium 2010, Köthen, Germany, 2011. Herausgegeben 2011, ISBN: 978-3-86011-026-3.
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2010
- Heiland, J.; Mehrmann, V.; Schmidt, M.; Systematic discretization of input/output maps and control of partial differential equations. In Siddiqi, A.H.; Singh, R.; Manchanda, P.; editors, Mathematics in Science and Technology; Mathematical Methods, Models and Algorithms in Science and Technology, Singapore, 2010. World Scientific Publisher. ISBN:978-981-4338-81-3,981-4338-81-8.
- Heiland, J.; Walle, A.; Mehrmann, V.; Schäfer, M.; Simulation and control of drop size distributions in stirred liquid/liquid systems. In 4th International Conference on Population Balance Modelling, Berlin, Germany, 2010. Herausgegeben als USB-Stick. [Poster]
- Maaß, S.; Hermann, S.; Kraume, M.; Determination of breakage rates with single drop experiments. In 4th International Conference on Population Balance Modelling, Berlin, Germany, 2010.
Herausgegeben als USB-Stick.
- Rojahn, J.; Maaß, S.; Kraume, M.; Measuring of particle size distributions in multi phase systems. In 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Antalya, Turkey, 2010. Herausgegeben als CD-ROM.
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Selected talks |
2011
- Hermann, S.; Maaß, S.; Walle A.; Schäfer, M.; Kraume, M.: Experimental and numerical investigations of drop size distributions in stirred liquid/liquid systems, Mixing XXII, NAMF, June 20-25 2010, Victoria BC, Canada
- Hermann, S.; Maaß, S.; Zedel, D. and Kraume, M.: Experimental and numerical investigations of drop breakage mechanism. 1st International Symposium on Multiscale Multiphase Process Engineering, October 4-10 2011, Kanazawa, Japan.
- Kamp, J.; Hermann, S.; Maaß, S. and Kraume, M.: Modelling of coalescence in turbulent Liquid/liqu\-id-dispersion considering droplet charge. 1st European Congress of Applied Biotechnology / 8th European Congress of Chemical Engineering, September 25-29 2011, Berlin, Germany.
- Maaß, S.; Hermann, S. and Kraume, M.: Process intensification and monitoring of stirred liquid-liquid dispersions. International Symposium on Mixing in Industrial Processes VII, September 18-22 2011, Beijing, China.
- Kamp, J.; Hermann, S. und Kraume, M.: Modellierung der Koaleszenz in turbulenten Flüssig/flüssig-Dispersionen unter Berücksichtigung der Tropfenladung. ProcessNet Jahrestreffen der Fachausschüsse Extraktion, Fluidverfahrenstechnik, Mehrphasenströmungen und Phytoextrakte, 03.03.-04.03.2011, Fulda, Deutschland.
- Hermann, S.; Maaß, S.; Walle, A.; Schäfer, M. und Kraume, M.: Einfluss des Stoffsystems und der Tropfengröße auf den Tropfenbruch. ProcessNet Jahrestreffen der Fachausschüsse Mischvorgänge und CFD, 21.02.-22.02.2011, Dortmund, Deutschland.
- Walle, A.; Heiland, J.; Schäfer, M.; Mehrmann, V.: Kopplung von CFD und Populationsbilanz zur Simulation der Tropfengrößenverteilung in gerührten Flüssig/flüssig-Systemen. ProcessNet Jahrestreffen der Fachausschüsse Mischvorgänge und CFD, 21.02.-22.02.2011, Dortmund, Germany
- Heiland, J.; Hermann, S.; Mehrmann, V.; Kraume, M.; Steuerung von Tropfengrößenverteilungen in gerührten Flüssig/flüssig-Systemen über lineare Zustandsraummodelle, 21.02.2011, Processnet Jahrestagung Mischen und CFD, Dortmund, Germany
- Heiland, J.; Mehrmann V.; Approximation of Boundary Control Systems for Dispersions in Turbulent Flows by Linear Differential-Algebraic Equations, 19.04.2011, Annual meeting of GAMM 2011, Graz, Austria
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2010
- Hermann, S.; Erdt, R.; Maaß, S.; Kraume, M.: Untersuchungen zur Steuerung von Tropfengrößenverteilungen, 13. Köthener Rührerkolloquium, 15.03.2010, Köthen
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Hermann, S.; Vazquez, S.; Maaß S.; Kraume, M.: Transientes Verhalten von Tropfengrößenverteilungen in Abhängigkeit von unterschiedlichen Rührerdrehfrequenzfunktionen ProcessNet Jahrestreffen des Fachausschusses Extraktion, 18.03.-19.03.2010, Kaiserslautern
- Hermann, S.; Zillmer, M.; Maaß, S.; Kraume, M.: Experimentelle Untersuchungen zum Einfluss des pH-Wertes auf den Tropfenbruch in Flüssig/flüssig-Systemen ProcessNet Jahrestreffen der Fachausschüsse Agglomeration, Zerkleinern/Klassieren und Mischvorgänge, 21.-23.02. 2010, Fulda
- Maaß, S.; Rojahn, J.; Hermann, S.; Kraume, M.: Automatisierte Bildverarbeitung für Insitu Überwachung und Steuerung von Mehrphasen Systemen, ProcessNet Jahrestreffen der Fachausschüsse Agglomeration, Zerkleinern/Klassieren und Mischvorgänge, 21.-23.02. 2010, Fulda
- Heiland, J.: Modelling Two-Phase Flows by Single Phase RANS and Population Dynamics, 10.06.2010, Seminar der AG ModNumDiff, Institut für Mathematik, TU Berlin
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Theses |
We offer interesting and challenging topics in real-world problems, suitable for Bachelor and Master theses and for seminar papers in the fields of mathematics, process engineering and mechanical engineering. Interested students are encouraged to apply to Jan Heiland (numerical mathematics, system and control theory) and Stephanie Nachtigall (process engineering) at TU Berlin or to Astrid Walle (CFD) at TU Darmstadt for detailed information.
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Page created and maintained by Jan Heiland, last updated: November 2011 |