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SPP 1141:  Analysis, Modeling and Calculation of Mixing Processes with and without Chemical Reaction

Subject Area Thermal Engineering/Process Engineering
Thermal Engineering/Process Engineering
Term from 2002 to 2008
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 5471746
 
Mixing Processes are used to obtain an equally mixed distribution of liquid or gaseous components on the molecular scale. Objective of the research project is to calculate the mass transport also under consideration of chemical reactions which are superimposed to the mixing process. The different scales for time and space of the mixing and the reaction process have to be considered for the visualization of the mixing processes with suitable measurement techniques. From the experimental results new models should be developed which are able to predict the transport and reaction processes theoretically. Subject of the investigations are mixing devices such as free stream jets, static mixers, micromixers and stirred vessels. Only single phase flows (gaseous or liquid) are considered with the liquid systems can have Newtonian or non-Newtonian rheological behavior. Measurement techniques which are working contactless or without substantial impact on the velocity, concentration and temperature fields are developed or improved. The sensors have the necessary temporal and spatial resolution to measure the transient fields. The analysis of the known experimental results leads to an improved model for the prediction of concentration and velocity fields during mixing processes. From that analytical and numerical methods are developed, which are able to calculate concentration and velocity fields with the necessary spatial and temporal resolution.
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