PhD student position in experimental fluid dynamics in Zürich

The research in the newly established group examines both fundamental and applied questions in various small-scale multiphase fluid phenomena, such as bubble and droplet dynamics and the resulting fast flows. One of our key objectives is to control bubble oscillations to exploit their energy-focusing characteristics. We also develop experimental techniques to observe and characterise high-speed multiphase fluid phenomena optically and acoustically. The group is part of the , which pursues a broad range of experimental, numerical and theoretical research efforts in a friendly and inclusive environment with state-of-the-art infrastructure.

Starting date: 1 October 2022, or later. Negotiable.

Duration of appointment: Maximum 4 years.

Currently, little is known about cavitation bubble dynamics in complex fluids. We are particularly interested in yield-stress fluids, which form a specific class of non-Newtonian fluids that possess characteristic yield stress below which they may support the imposed external stress elastically but beyond which they no longer act as a solid but rather flow like a viscous fluid. Such viscoplastic behaviour is present in a wide range of soft materials, such as emulsions, foams, detergents, and gels. Cavitation bubble dynamics in such media are relevant in numerous industrial sectors such as additive manufacturing, food industry, cosmetics, and ultrasound-induced degassing and defoaming processes.

We seek to appoint a PhD student to conduct experimental research to discover the effects of material mechanical properties on cavitation bubble dynamics in yield stress fluids and soft elastic solids. You will design your experimental setup by exploiting the state-of-the-art ultra-high-speed imaging, optical and acoustic facilities available in our lab. You will also couple your experimental findings with numerical simulations performed by our collaborators at the of University of Amsterdam, the Netherlands (numerical PhD opening of this project can be found ), with whom tight scientific exchange will happen throughout the project. In addition to research, you will contribute to teaching and lab activities in the institute.

The requirements include a Master's degree in mechanical, aeronautical or chemical engineering, physics, material science or a related field. You should be curiosity-driven, creative, open-minded and independent, and have good communication skills, fluency in English and the willingness to fully commit yourself as a part of an international team. You should also have strong interests in experimental fluid mechanics, multi-phase flows, acoustics, and similar. Experience in experimental research is an advantage, but not necessary. However, you should be excited about the prospect of working in a lab.

ETH Zurich is a family-friendly employer with excellent working conditions. You can look forward to an exciting working environment, cultural diversity and attractive offers and benefits.

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