ER Laura Riedel

M.Sc. Eva Rütten

  • Postanschrift: Kaiserstr. 12
    Liefer- und Besucheranschrift: Gotthard-Franz-Straße 3
    Geb. 50.31, 4. OG
    D-76131 Karlsruhe

About myself

I completed my studies in chemical and process engineering at KIT from 2012 to 2019. During my bachelor's degree, I focused on food process engineering and thus had my first contact with the institute. My bachelor thesis was in the field of the formulation of melt emulsions by high-pressure homogenization. In the Master's program, I specialized in mechanical process engineering and gas-particle systems. I was able to extend my studies by a stay abroad at the NTNU in Trondheim. After finishing my master thesis on cavitation in the process of simultaneous emulsification and mixing, I have been working as a research assistant at the Research Group Emulsification Technologies since November 2019.

Research focus

High-pressure homogenization is state of the art to produce emulsions with small droplet sizes. During the process different stresses occur. In addition to strain, shear and turbulence, cavitation can also occur due to the high acceleration of the fluid. The influence of cavitation on the local flow parameters could not be fully investigated so far. Therefore, I am currently working on the influence of cavitation on the flow in the high-pressure homogenization process. By investigating stress profiles along the streamlines, conclusions on the differences of the flow parameters in cavitating and non cavitating flow are to be drawn.


Both experimental and numerical methods are used. Orifices are used for experimental investigations of the process. The process is operated with a two-piston pump. For the visualization of the cavitation an optically accessible downstream is used. With the help of a high-speed camera, so-called shadow images are recorded in this area and evaluated by means of image processing in Matlab. Since the flow cannot be observed experimentally in the entire process, it is modelled by a CFD simulation in Ansys Fluent. Experimentally determined data such as mass flow, outlet pressure and temperatures are used as boundary conditions. The validation of the simulation is done by means of the inlet pressure.



Possibilities and limits of modeling cavitation in high-pressure homogenizers – a validation study
Rütten, E.; Leister, N.; Karbstein, H. P.; Håkansson, A.
2024. Chemical Engineering Science, 283, Art.-Nr.: 119405. doi:10.1016/j.ces.2023.119405
Influence of the droplet trajectory on the resulting droplet deformation and droplet size distribution in high‐pressure homogenizer orifices
Preiss, F. J.; Rütten, E.; Tröster, A.; Gräf, V.; Karbstein, H. P.
2022. The Canadian Journal of Chemical Engineering, 100 (7), 1451–1467. doi:10.1002/cjce.24363


Modellvalidierung zur Simulation von Kavitation im Hochdruckhomogenisator
Rütten, E.; Karbstein, H.; Håkansson, A.
2023, March 28. Jahrestreffen der DECHEMA-Fachgruppen Aerosoltechnik (AT), Gasreinigung (GAS), Mehrphasenströmung (MPH) und Partikelmesstechnik (PMT 2023), Paderborn, Germany, March 28–30, 2023


Numerical investigation of stresses leading to droplet deformation prior their breakup in high pressure homogenizers (HPH)
Rütten, E.; Preiss, F. J.; Karbstein, H. P.
2022, June 28. 18th European Student Colloid Conference (ESC 2022), Szeged, Hungary, June 26–30, 2022
Investigation of the Influence of Cavitation on the Fluid Flow in High- Pressure Homogenization Nozzles using CFD Simulations
Rütten, E.; Gall, V.; Karbstein, H. P.
2020, March 9. 4th Spring School: Lattice Boltzmann Methods with OpenLB Software Lab (2020), Berlin, Germany, March 9–13, 2020