PhD Position Continuum Two-Phase Flow Modelling of Piping in Dikes

Delft University of Technology; Delft; On-site; EUR 34,000 - 43,000; Full time

Job summary

Delft University of Technology invites applications for a PhD position focused on continuum two-phase flow modelling of piping in dikes. You will develop and refine Eulerian two-phase models to predict internal erosion and pipe progression in clay-sand layered dikes, linking fundamental physics with computational modelling.

You will work in the Offshore and Dredging Engineering group, collaborating with researchers across fluids, soils, and hydraulic engineering.

Qualifications

• MSc in Mechanical Engineering, Chemical Engineering, Applied Physics, Process Technology, Civil Engineering or closely related discipline.
• Training in multiphase flow physics, numerical methods, CFD; MSc project or internship experience preferred.
• Excellent communication skills in English and ability to mentor MSc students.
• Familiarity with Euler–Euler multiphase flow modelling and/or mesh adaptation techniques is advantageous.

Responsibilities

• Develop continuum-based two-phase models to predict internal erosion and pipe progression in clay-sand layered dikes.
• Derive constitutive modelling approaches from high-fidelity DNS-DEM data within the project consortium.
• Explore adaptive mesh refinement to balance accuracy and computational efficiency.
• Publish research outcomes and present at conferences; collaborate across fluids, soils, and hydraulic engineering.

Skills

multiphase flow

CFD

English communication

teaching

Education

MSc in relevant field

Tools

Euler–Euler modelling

Automatic mesh refinement

Job description

Develop advanced models to understand and predict piping and internal erosion in dikes. As a PhD researcher at TU Delft, you will connect fundamental fluid–soil interaction physics with computational modelling to contribute to safer flood defences.

PhD Position Continuum Two-Phase Flow Modelling of Piping in Dikes

• Hours per week: 36-40
• FTE: 1,0

Job description

Internal erosion and piping are among the main failure mechanisms of clay–sand layered dikes and remain important challenges in flood risk management. Reliable numerical models can improve our understanding of how piping develops and help engineers assess and design safer, more reliable flood defence systems. In this PhD project, you will contribute to this challenge by advancing the modelling of particle transport and fluid–soil interaction in dikes.

A key scientific challenge is to represent the complex interaction between soil particles and flowing water across different spatial and temporal scales, while keeping the models computationally efficient. The research builds on an Eulerian two-phase modelling approach previously applied to backward erosion piping. You will investigate how this approach can be further developed to capture the physical processes that govern pipe formation and progression, while connecting detailed modelling with larger-scale analyses.

The goal of the project is to develop a robust and computationally efficient modelling framework that improves the prediction of piping in layered dikes. Your research will contribute to a better understanding of internal erosion and support the development of safer flood defence systems and more reliable flood risk assessments.

Your responsibilities

As a PhD researcher, you will:

• Develop continuum-based two-phase models to predict internal erosion and pipe progression in clay-sand layered dikes.
• Derive constitutive modelling approaches from high-fidelity DNS-DEM data generated within the broader project consortium.
• Capture the multi-scale nature of pipe formation while maintaining computational efficiency, including the exploration of adaptive mesh refinement strategies.
• Disseminate research outcomes through scientific publications, conference presentations, and collaboration with researchers from relevant disciplines.

Your work environment

You will join the Offshore and Dredging Engineering group within the department of Maritime and Transport Technology of the Faculty of Mechanical Engineering. You will receive supervision and guidance while having the freedom to shape and develop your research. You will have access to well-equipped facilities, including: The hydraulic circuit.

You will work in an open and collaborative environment where interdisciplinary teamwork, curiosity and scientific excellence are valued. The group works closely across fluid mechanics, soil mechanics, hydraulic engineering and ocean engineering, using various computational and experimental techniques, sharing knowledge and expertise to develop innovative solutions with meaningful societal impact.

Job requirements

You are highly motivated to translate fundamental flow and erosion physics into practically relevant scales through two-phase flow modelling. You are well organised, manage your time effectively and take initiative in a multidisciplinary research environment. You are results-oriented and enjoy working with researchers from different disciplines.

Furthermore, you meet the following requirements:

• You have an MSc degree in a relevant field (Mechanical Engineering, Chemical Engineering, Applied Physics, Process Technology, Civil Engineering or a closely related discipline)
• You have received training in multiphase flow physics, numerical methods, and computational fluid dynamics (CFD), ideally complemented by application in your MSc thesis, research projects, or internships.
• Have excellent communication skills and command of English.
• Have affinity with teaching and guiding MSc students.
• Familiarity with Euler–Euler multiphase flow modelling and/or automatic mesh adaptation techniques is considered an advantage.

TU Delft (Delft University of Technology)

Delft University of Technology is a top international university combining science, engineering and design. It delivers world class results in education, research and innovation to address challenges in the areas of energy, climate, mobility, health and digital society.

Faculty Mechanical Engineering

At TU Delft, our people make the difference. With their knowledge and curiosity, our staff provide a high-quality education and conduct pioneering research that extends beyond the campus. You will have the opportunity to take the initiative, work with others, and grow as a professional.

Working at TU Delft means join an international community of professionals and students. Together, we create knowledge, innovations, and solutions that help move the world forward.

Conditions of employment

Doctoral candidates will be offered a 4-year period of employment in principle, but in the form of 2 employment contracts. An initial 1,5 year contract with an official go/no go progress assessment within 15 months. Followed by an additional contract for the remaining 2,5 years assuming everything goes well and performance requirements are met.

Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities, increasing from €3059 - €3881 gross per month, from the first year to the fourth year based on a fulltime contract (38 hours), plus 8% holiday allowance and an end-of-year bonus of 8.3%.

As a PhD candidate you will be enrolled in the TU Delft Graduate School. The TU Delft Graduate School provides an inspiring research environment with an excellent team of supervisors, academic staff and a mentor. The Doctoral Education Programme is aimed at developing your transferable, discipline-related and research skills. The TU Delft offers a customisable compensation package, discounts on health insurance, and a monthly work costs contribution. Flexible work schedules can be arranged.

Will you need to relocate to the Netherlands for this job? TU Delft is committed to make your move as smooth as possible! The HR unit, Coming to Delft Service, offers information on their website to help you prepare your relocation. In addition, Coming to Delft Service organises events to help you settle in the Netherlands, and expand your (social) network in Delft. A Dual Career Programme is available, to support your accompanying partner with their job search in the Netherlands.

Doing a PhD at TU Delft requires English proficiency at a certain level to ensure that the candidate is able to communicate and interact well, participate in English-taught Doctoral Education courses, and write scientific articles and a final thesis.

As part of knowledge security, TU Delft conducts a risk assessment during the recruitment of personnel. We do this, among other things, to prevent the unwanted transfer of sensitive knowledge and technology. The assessment is based on information provided by the candidates themselves, such as their motivation letter and CV, and takes place at the final stages of the selection process. When the outcome of the assessment is negative, the candidate will be informed.