PhD Candidate / PhD Candidate

PhD Position in Numerical and Experimental Studies of Non-Spherical and Deformable Granular Systems

100%, Zurich, fixed-term

ETH Zurich is one of the world’s leading universities, renowned for its excellence in education, cutting-edge research, and commitment to translating new knowledge and innovations into practical applications. The Laboratory of Energy Science and Engineering (D-MAVT) is actively involved in developing numerical and experimental tools that investigate single- and multiphase granular systems.

Project Background

Granular systems are prevalent in nature (e.g., rock avalanches or dunes) and hold fundamental importance in various industrial applications. Despite their significance, many critical phenomena—such as segregation, surface instabilities, and jamming (the transition between fluid-like and solid-like states)—remain poorly understood. This project will explore the effects of particle deformability and non-sphericity on the dynamics and rheology of granular systems.

Flexible particles undergo deformation under stress, which influences contact forces and stress transmission, resulting in complex rheological behaviors such as transient jamming or stress-induced orientational ordering. While systems of deformable, aspherical particles are expected to reveal a rich array of physical phenomena, they have been largely overlooked due to challenges in conducting experimental measurements and their numerical description.

This PhD position is part of a collaborative project between two research groups: the Laboratory of Energy Science and Engineering, led by Prof. Müller, and the Institute for Biomedical Imaging Magnetic Resonance Technology, led by Prof. Prüssmann. The PhD students in both groups are anticipated to work closely together on a daily basis.

Job Description

The objective of the PhD student hired by the Laboratory of Energy Science and Engineering is to:

• Advance numerical tools to model non-spherical and deformable granular systems.
• Establish camera-based experimental techniques, such as photoelasticity, to determine contact forces and stress fields in these systems.
• Develop and apply machine learning-based models to correlate particle deformation and contact forces in 3D systems.

Profile

• Applicants should possess a strong MSc degree in Mechanical Engineering, Physics, or related fields.
• Previous experience in numerical modeling or imaging techniques is advantageous.
• We seek highly motivated, committed, and creative individuals who can work well in a team and possess excellent communication skills in English, both oral and written.
• The candidate will have the unique opportunity to develop their research abilities in a top-tier research environment.
• The position is available from July 2026 onwards.

Workplace

The position will be based at the ETH Zurich campus in Zurich, providing access to state-of-the-art facilities and a vibrant academic community.

We Offer

• An exciting working environment.
• Opportunities to learn cutting-edge techniques.
• Perspectives for career development.
• A diverse and interdisciplinary team.

Valuing Diversity and Sustainability

In line with our values, ETH Zurich fosters an inclusive culture. We promote equal opportunities, value diversity, and nurture a working and learning environment in which everyone's rights and dignity are respected. Visit our Equal Opportunities and Diversity website to learn how we ensure a fair and open environment that allows everyone to grow and thrive. Sustainability is central to our mission, and we are consistently working towards a climate-neutral future.

Curious? So Are We.

We welcome you to apply online using the form below. Please ensure your application includes:

• Motivation letter
• CV
• Transcripts
• Names of two potential referees

Note that only applications matching the job profile will be considered.

For further information about the Laboratory of Energy Science and Engineering, please visit our website. For questions regarding the position and recommendation letters, please contact Prof. Christoph Müller via email at muelchri@ethz.ch.

About ETH Zurich

ETH Zurich is a prestigious university specializing in science and technology. We are recognized for our exceptional education, pioneering research, and effective transfer of innovative knowledge into society. With over 30,000 individuals from more than 120 countries, our university promotes independent thinking and inspires excellence. Located in the heart of Europe, we strive to develop solutions for the global challenges of today and tomorrow.