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Steffen Recktenwald

M.Sc. Steffen Recktenwald

Group: 

Applied Mechanics (AME)


Room: 217
Phone: +49 721 608 -42805
Fax: +49 721 608 -43758
steffen recktenwaldFwg9∂kit edu

KIT - Campus Süd
Institut für Mechanische Verfahrenstechnik und Mechanik
Arbeitsgruppe Angewandte Mechanik

Gotthard-Franz-Straße 3, Geb. 50.31 
76131 Karlsruhe



Flow-induced structure formation in surfactant solutions

Flow-induced structure formation in surfactant solutions
Contact:

Steffen Recktenwald

Surfactants that can self-assemble to form worm-like micelles (WLM) are widely used in home and personal care products, inkjet printing, drag reduction agents or in enhanced oil recovery. Depending on the surfactant concentration, type of salt and salt/surfactant ratio, linear or branched structures can emerge in WLM solutions. Numerous technical processes exhibit complex flow fields with strong elongational components. In such elongational flows, structural changes occur, thus leading to a dramatic change of the flow behavior. Rheological methods such as the “Capillary Breakup Elongational Rheometry (CaBER)” and the “Optimized-Shape Cross-slot Extensional Rheometer (OSCER)“ are combined with birefringence and ”Particle Image Velocimetry (PIV)“ measurements, to investigate these flow-induced structural changes. Based on the results models can be developed, which enable to predict these structures depending on the material and flow parameters.

 

Publications

  1. Müge Pilavtepe, Steffen M. Recktenwald, Rainer Schuhmann, Katja Emmerich, and Norbert. Willenbacher, “Macro- and microscale structure formation and aging in different arrested states of Laponite dispersions,” Journal of Rheology., Vol. 62, No. 2, pp. 593–605, 2018

Conference Contributions

  1. Steffen. M. Recktenwald and Norbert Willenbacher
    Flow in Surfactant Filaments (Talk)
    Joint Symposium of the German Rheological Society and ProcessNet-Subject Division Rheology 2017, March 13-14 2017, Berlin, Germany

 

  1. Steffen. M. Recktenwald, Simon J. Haward, Amy, Q. Shen and Norbert Willenbacher
    Elongational Flow Behavior of Surfactant Solutions at Low Concentrations (Talk)
    Joint Symposium of the Belgian Group of Rheology and the German Rheological Societyand the ProcessNet-Subject Division „Rheology“ 2018, March 19-20 2018, University of Luxembourg, Luxembourg

 

  1. Steffen. M. Recktenwald, Simon J. Haward, Amy, Q. Shen and Norbert Willenbacher
    Flow Instabilities during Uniaxial and Planar Elongational Deformation of Surfactant Solutions at Low and High Concentrations (Talk)
    Annual European Rheology Conference 2018 (AERC 2018), April 17-20 2018, Sorrento, Italy

Lectures

Diplom-, Master-, Studien- und Bachelorarbeiten Steffen Recktenwald
Titel type time
Bachelor-/Masterarbeit nach Absprache
Bachelorarbeit nach Absprache