TU-ID: 207 | 2024 | 43 | 242218
University Assistant Prae-Doc (all genders)
30 hours/week | limited to 4 years
TU Wien is Austria's largest institution of research and higher education in the fields of technology and natural sciences. With over 26,000 students and more than 4000 scientists, research, teaching, and learning dedicated to the advancement of science and technology have been conducted here for more than 200 years, guided by the motto "Technology for People". As a driver of innovation, TU Wien fosters close collaboration with business and industry and contributes to the prosperity of society.
The Institute of Materials Technology, Building Physics and Building Ecology has a vacancy for a University Assistant (Prae-Doc) for 30 hours per week from January 2025, limited to expected for 4 years.
This interdisciplinary research project in the field of building materials science and materials technology deals with the flow and sedimentation behavior of multidisperse suspensions as a model for cementitious materials.
It has been observed that cement sheared in a rheometer exhibits shear localization that occurs rapidly after the start of shear, and the system may never fluidize due to the increasing interactive forces associated with the precipitation of highly charged nanohydration products [1].
Shear localization has also been linked to shear-induced migration of particles and sedimentation, both processes that depend on particle size and the solid volume fraction of particles in suspension [2].
In this project, the behavior of model suspensions is investigated and compared with the behavior of cementitious slurries, focusing on the influence of the particle size aspect (bi-disperse suspensions) and on the influence of solids volume fraction and particle packing.
References:
[1] S. Dhar, T. Liberto, A. Robisson, ÖGR conference (2024), article in preparation
[2] Dhar, S., Liberto, T., Barentin, C. et al. Discrepancies in dynamic yield stress measurements of cement pastes. Rheol Acta 63, 657-672 (2024). https://doi.org/10.1007/s00397-024-01465-9
This interdisciplinary research project in the field of building materials science and materials technology deals with the flow and sedimentation behavior of multidisperse suspensions as a model for cementitious materials.
It has been observed that cement sheared in a rheometer exhibits shear localization that occurs rapidly after the start of shear, and the system may never fluidize due to the increasing interactive forces associated with the precipitation of highly charged nanohydration products [1].
Shear localization has also been linked to shear-induced migration of particles and sedimentation, both processes that depend on particle size and the solid volume fraction of particles in suspension [2].
In this project, the behavior of model suspensions is investigated and compared with the behavior of cementitious slurries, focusing on the influence of the particle size aspect (bi-disperse suspensions) and on the influence of solids volume fraction and particle packing.
References:
[1] S. Dhar, T. Liberto, A. Robisson, ÖGR conference (2024), article in preparation
[2] Dhar, S., Liberto, T., Barentin, C. et al. Discrepancies in dynamic yield stress measurements of cement pastes. Rheol Acta 63, 657-672 (2024). https://doi.org/10.1007/s00397-024-01465-9
Tasks:
- Research and project activity
- Collaboration on research and teaching tasks as well as examinations
- Cooperation and guidance of students
- Writing a dissertation and publications
- Participation in scientific events
- Assistance/Collaboration in organizational and administrative tasks
Your profile:
- Completion of a master's or diploma curriculum in one of these fields: physics, fluid mechanics or materials science
- Advanced knowledge of English or German
- Basic experimental knowledge with interest in suspensions, complex fluids and rheology
- Keywords - suspension, bidisperse particles, rheology, velocity profiles, PIV, data analysis (Matlab or Python)
We offer:
- International team
- Diverse technical backgrounds (civil, mechanical and chemical engineering, physics and materials science) and a 500+m2 laboratory
- A range of attractive social benefits (see TU Wien fringe benefit catalog)
- Wide range of internal and external training opportunities, various career options
TU Wien is committed to increasing the proportion of women in particular in leadership positions. Female applicants are explicitly encouraged to apply. Preference will be given to women when equally qualified, unless reasons specific to a male applicant tilt the balance in his favour.
People with special needs are equally encouraged to apply. In case of any questions, please contact the confidant for disabled persons at the university, Mr. Gerhard Neustätter.
People with special needs are equally encouraged to apply. In case of any questions, please contact the confidant for disabled persons at the university, Mr. Gerhard Neustätter.
Entry level salary is determined by the pay grade B1 of the Austrian collective agreement for university staff. This is a minimum of currently EUR 2,684.10/month gross, 14 times/year for 30 hours/week. Relevant working experiences may increase the monthly income.
We look forward to receiving your application until December 05th, 2024.
We look forward to receiving your application until December 05th, 2024.
