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Sara Marcos Ortega

I Sara Marcos have obtained a Master degree in Chemical Engineering at the University of Valladolid and performed my Master thesis at TU Dortmund, BCI, Laboratory of Thermodynamic, within an Erasmus program. The topic was “prediction of proteins solubility by using the second osmotic virial coefficient”. I joined a PhD student position at Ruhr-University Bochum on topic “Process intensification by pressure enforced mixing technologies” with Prof. E. Weidner. 

Static mixers have become standard equipment in the process industries, due to the large field of applications that they have and the several advantages that they present in contrast to conventional agitation. They can be used in continuous processes requiring shorter residence times, less costs, achieving the same or even better performance than mechanical agitation. Within the several areas of application, it is necessary to mention their use in dispersion of fluids with extremely diverse viscosity, homogenization of melts in polymer processing, liquid-liquid extraction, heat transfer enhancement for viscous fluids, etc[1]. However new designs are being developed and new applications are being explored, like their use in high pressure technology. Thereby this project with the topic “process intensification by pressure enforced mixing technologies” has been proposed. It is focused on understanding and prediction of highly viscous fluids behavior under elevated pressure in presence of compressed gases in a static mixer. Therefore the knowledge of the flow pattern and the mixing quality and efficiency through a motionless mixer is required.

To accomplish this task the project is divided into three interconnected subgroups. The experimental part of the project is split into two subgroups, which are divided due to the nature of the substances. In order to provide the knowledge of mixing quality with regard to the influence of the static mixers design, experiments on residence time distribution (miscible substances) and droplet size distribution (immiscible substances) will be performed. Finally the third task is the modelling of the flow through a static mixer with computational fluid dynamics. The model will be validated with the results of the experiments obtained from the other two subgroups. Thus it will be possible to explain the flow behavior of high viscous fluids and supercritical gases through a static mixer. To describe the substances, used in theoretical models, additional information like solubility, density, viscosity and interfacial tension is essential.


Coordinator's office:
Dr. S. Kareth
IC 3/65
Chair for Process Technology
Faculty Mechanical Engineering
Ruhr-University Bochum
D-44780 Bochum, Germany
e-mail: Kareth@vtp.rub.de