FOR 338:  Anwendungen der Magnetischen Resonanz zur Aufklärung von Stofftransportprozessenin dispersen Systemen

• Subject Area: Thermal Engineering/Process Engineering
• Term: from 1999 to 2006
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 5465406

Disperse systems are substance mixtures as for example suspensions, emulsions, packed beds as well as porous media. In many natural and also technical processes, transport phenomena play a major role. A variety of model systems has been developed. However, little is known about the structural properties of porous system. NMR (nuclear magnetic resonance) shows a variety of different applications. Depending on the NMR technique, measurements are spatially or energetically resolved, or reveal the time-dependence of the spin system properties. Consequently, the spin density, the relaxation times as well as the chemical shift can be used for contrast in NMR images. NMR imaging allows the observation of, for example, the hollow space in solid porous media, diffusion coefficients, 3D velocity images in disperse systems, spatially resolved concentration and temperature distributions, as it is demonstrated in literature. The aim of the research unit is the investigation of the applicability of well known NMR techniques in the field of disperse systems. Fundamental questions concern the structural characterization of synthetic and natural porous materials as well as measurement and interpretation of transport phenomena in disperse systems. New NMR methods are to be developed to gain insight into processes relevant to the engineering of disperse systems.

• DFG Programme: Research Units

Projects

• Charakterisierung der Hohlraumstruktur wassergesättigter Haufwerke unter verschiedenen Kompaktierungsbedienungen (Applicant Stahl, Werner )
• Charakterisierung der Struktur von hochgefüllten Materialien und Schäumen, ohne und unter Belastung (Applicant Eisenreich, Norbert )
• Dreidimensionale Darstellung von Festkörperstrukturen (Applicant Höpfel, Dieter )
• Entwicklung und Anwendung spezieller NMR Methoden zum Studium von Struktur und Fluid-Transport in ingenieurwissenschaftlich interessierenden Feststoff-Matrizen (Applicant Holz, Manfred )
• Modellierung der Trocknungsvorgänge bei der Mikrowellenvakuumstrocknung von Lebensmittel (Applicant Schubert, Helmar )
• NMR method to investigate the mobility of partly fluorinated hydrocarbons in polymers (Applicant Oellrich, Lothar R. )
• Struktur und Durchführung von Filtermedien während der Partikelabscheidung (Applicant Kasper, Gerhard )
• Strömung Nicht-Newtonscher Fluide in porösen Feststoffmatrizen (Applicant Buggisch, Hans W. )
• Untersuchung der Fluiddynamik von Flüssigkeiten und Gasen bei der gemeinsamen Durchströmung im Rieselbettreaktor (Applicant Reimert, Rainer )
• Untersuchung der Fluidmechanik von Flüssigkeiten und Gasen bei der gemeinsamen Durchströmung von Schüttungen (Applicant Reimert, Rainer )
• Zentralprojekt (Applicant Buggisch, Hans W. )

• Spokesperson: Professor Dr.-Ing. Rainer Reimert
• Deputy: Professor Dr. Hans W. Buggisch