Dr. Milad Eftekhari Tel.: +49 351 260 3873

Job-Id: 2026/34 (2207)

At HZDR, we promote and value diversity among our employees. We welcome applications from people with diverse backgrounds regardless of gender, ethnic and social origin, belief, disability, age, and sexual orientation. Severely disabled persons are given preference in the event of equal suitability.

Helmholtz-Zentrum

PhD Student (f/m/d) Multisensor and Multiscale Measurement Techniques for Hydrodynamic Characterization of Flotation Cells

With cutting-edge research in the fields of ENERGY, HEALTH and MATTER, around 1,500 employees from more than 70 nations at Helmholtz-Zentrum Dresden-Rossendorf (HZDR) are committed to mastering the great challenges facing society today.

The Institute of Fluid Dynamics is conducting basic and applied research in the fields of thermo-fluid dynamics and magnetohydrodynamics in order to improve the sustainability, the energy efficiency and the safety of industrial processes.

The Department of Fluid Dynamics Resource Technology Processes is looking for a PhD Student (f/m/d) Multisensor and Multiscale Measurement Techniques for Hydrodynamic Characterization of Flotation Cells.

Your tasks

• Measure and analyze flow-field and turbulence quantities, including turbulent kinetic energy (TKE), using PIV/LIF as well as fiber-optic and piezoelectric vibration sensors
• Investigate gas dispersion in different zones of the flotation cell by determining bubble size distributions (e.g., using optical probes) and/or by applying ultrafast X-ray tomography (e.g., ROFEX)
• Develop and further improve multi-sensor and imaging-based measurement methods to capture key process variables in different zones of the flotation cell
• Integrate and interpret data from different sensors and measurement techniques to provide a consistent hydrodynamic validation dataset for flotation-cell CFD studies carried out by collaborating researchers

Your profile

• Completed university studies (Master/Diploma) in the field of Process Engineering, Mechanical Engineering, Chemical Engineering, or a comparable discipline
• Experience or strong interest in fluid dynamics, turbulence, multiphase flows, and bubbly flows
• Familiarity with multiphase measurement systems (e.g., PIV, piezoelectric vibration sensors)
• Independent, structured, and reliable way of working in the laboratory
• Strong problem-solving skills in experimental setup, instrumentation, and measurement campaigns
• Willingness to collaborate with industrial and academic partners and to participate in experimental campaigns; a secondment of around 3 months in Chile is planned
• Basic to good programming skills for data analysis and image processing (e.g., MATLAB, Python)
• Good written and spoken English

Our offer

• A vibrant research community in an open, diverse and international work environment
• Scientific excellence and extensive professional networking opportunities
• A structured PhD program with a comprehensive range of continuing education and networking opportunities - more information about the PhD program at the HZDR can be found here
• Salary and social benefits in accordance with the collective agreement for the public sector ( TVöD-B und) including 30 days of paid holiday leave, company pension scheme (VBL)
• We support a good work-life balance with the possibility of part-time employment, mobile working and flexible working hours
• Numerous company health management offerings
• Employee discounts with well-known providers via the platform Corporate Benefits
• An employer subsidy for the "Deutschland-Ticket Jobticket"

We look forward to receiving your application documents (including cover letter, CV, diplomas/transcripts, etc.), which you can submit via our online-application-system.