PhD student in numerical simulations of reactive Brownian systems

Chalmers University of Technology


February 11, 2022


We are offering a PhD student position in the Multiphase Flow group at the Division of Fluid Dynamics, in a project carried out in collaboration with Fraunhofer-Chalmers Centre. We are going to investigate migration, mixing and modulation in reactive Brownian systems of arbitrary geometric complexity using our own state-of-the-art multiphase direct numerical simulation (DNS) method. These investigations are crucial to enable optimization of applications governed by the motion of metal nanoparticles, colloid contaminants, macromolecules, cellular bacteria, red blood cells, DNA, and fractal aggregates. Such applications include, for example, micro- or nanofluidic reactors, lab-on-a-chip devices and surface-based sensors.

We are looking for a creative new colleague that wants to take on this challenge together with us. The group has approximately 15 members of varying backgrounds and research interests.

Project description Transport of reactive Brownian particles of complex shape in intricate geometries plays a key role in a wide range of industrial and biological systems. In some applications, such as sensors, the ambition is to get a target particle as quickly as possible to a surface. In others, such as microfluidic reactors, particle-wall interactions lead to fouling, deterioration of functionality and eventually blockage of the flow system.

In these processes, particles move in meandering trajectories due to thermal fluctuations while being transported with the flow. The interaction between particles of different kinds, and between particles and walls, can be very complex. Variations in particle shapes, sizes, and concentrations, as well as the details of the bounding geometry and the characteristics of the carrier flow, tend to give rise to particle migration.

In this project, we will use our previously developed computational framework to study migration, mixing and modulation in geometrically complex reactive Brownian systems. We will identify under what conditions one can enhance or suppress the transport of a Brownian particle towards a surface. The results will be crucial for the further development and optimization of surface-based sensing techniques, for high-level control of mixing and segregation phenomena in microfluidic devices, and for anti-fouling measures in microfluidic devices.

Major responsibilities Your major responsibilities as a PhD student is to pursue your own doctoral studies. You are expected to develop your own scientific concepts and communicate the results of your research verbally and in writing. Your research will be supervised by several well-reputed senior researchers, offering a supportive environment for performing cutting-edge research.

The position also includes teaching or other departmental duties corresponding to 10-20 % of working hours.

Contract terms Full-time temporary employment. The position is limited to a maximum of 4.5-5 years depending on the amount of teaching and departmental work during your doctoral project.

Qualifications To qualify as a PhD student, you must have a master's level degree corresponding to at least 240 higher education credits in a relevant field (such as Mechanical Engineering, Chemical Engineering, Engineering Physics, Engineering Mathematics or similar). The position requires sound verbal and written communication skills in Swedish and English. If Swedish is not your native language, you should be able to teach in Swedish after two years. Chalmers offers Swedish courses.

We think that you are a self-propelled and motivated person that tend to plan and think strategically. You are creative and like to put new ideas into practice. You have a solid interest in scientific computing and a strong natural curiosity with a genuine wish to learn more and develop your skills and knowledge further in the fields of research, research communication and project management. Previous programming experiences are considered meritorious.

We offer Chalmers offers a cultivating and inspiring working environment in the coastal city of Gothenburg. Read more about working at Chalmers and our benefits for employees.

Chalmers aims to actively improve our gender balance. We work broadly with equality projects, for example the GENIE Initiative on gender equality for excellence. Equality and diversity are substantial foundations in all activities at Chalmers.

Application procedure The application should be marked with Ref 20210613 and written in English. The application should be sent electronically and be attached as pdf-files, as below:

CV: (Please name the document: CV, Family name, Ref. number) • CV • Other, for example previous employments or leadership qualifications and positions of trust. • Two references that we can contact.

Personal letter: (Please name the document as: Personal letter, Family name, Ref. number) 1-3 pages where you: • Introduce yourself • Describe your previous experience of relevance for the position (e.g. education, thesis work and, if applicable, any other research activities) • Describe your future goals and future research focus

Other documents: • Copies of bachelor and/or master's thesis. • Attested copies and transcripts of completed education, grades and other certificates, e.g. TOEFL test results.

Please use the button at the foot of the page to reach the application form. The files may be compressed (zipped).

Application deadline: 11 February, 2022

For questions, please contact: Professor Henrik Ström, Fluid Dynamics Email: Phone: +46317721360

Chalmers declines to consider all offers of further announcement publishing or other types of support for the recruiting process in connection with this position.

Chalmers University of Technology conducts research and education in engineering sciences, architecture, technology-related mathematical sciences, natural and nautical sciences, working in close collaboration with industry and society. The strategy for scientific excellence focuses on our six Areas of Advance; Energy, Health Engineering, Information and Communication Technology, Materials Science, Production and Transport. The aim is to make an active contribution to a sustainable future using the basic sciences as a foundation and innovation and entrepreneurship as the central driving forces. Chalmers has around 11,000 students and 3,000 employees. New knowledge and improved technology have characterised Chalmers since its foundation in 1829, completely in accordance with the will of William Chalmers and his motto: Avancez!

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