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

Interested in connecting complex physics to real world flood safety? Join this PhD on piping and internal erosion.

This PhD project centres on the development of continuum based two phase models to describe particle transport and fluid–soil interaction in dikes.

Job description

Internal erosion and piping are among the main failure mechanisms of clay–sand layered dikes and remain an important topic in flood risk management. Numerical models are used to support the prediction of piping initiation and progression, as well as the assessment and design of flood defence systems.

The research builds on an Eulerian two phase approach, which has been applied in the modelling of backward erosion piping. Within this framework, there is room to further develop and adapt modelling strategies. Possible directions include the use of constitutive relations for particle–particle and particle–fluid interactions based on Direct Numerical Simulations with Discrete Element Modelling (DNS–DEM) simulation data generated within the project.

The work includes capturing the multi-scale nature of the problem while retaining computational efficiency. Adaptive mesh strategies may be explored, with fine resolution in regions where pipe formation is expected and coarser resolution in surrounding zones governed by Darcy flow. Based on soil–fluid interface modelling and expected pipe dimensions, the mesh resolution can be assessed and refined during the project.

In addition, the project may include the development and/or refinement of a reduced one dimensional two phase pipe element model derived from the three dimensional formulation, enabling coupling with Random Finite Element Method (RFEM) studies in collaboration with other researchers involved in the project.

The PhD position is embedded in a multidisciplinary research team at TU Delft, at the intersection of geotechnical engineering, computational mechanics, and fluid dynamics. Supervision and guidance are provided, while allowing scope for self-directed contributions to the research. The project includes opportunities for collaboration, conference participation, and publication in key international journals.

Job requirements

We are looking for a highly motivated and skilled candidate who is enthusiastic about the translation of fundamental flow and erosion physics to practically relevant scales through two-phase flow modelling.

The successful candidate should:

• Have an MSc degree in a relevant field (Civil Engineering, Geotechical Engineering, Mechanical Engineering, Applied Physics, Ocean Engineering).
• Have demonstrated experience in fluid mechanics, computational fluid dynamics and scientific programming. Familiarity with Euler–Euler approaches or the development of mathematical flow models is considered an advantage.
• Have the ability to work in a multidisciplinary consortium, taking initiatives and being results-oriented.
• Be well organized and have excellent time management skills.
• Have excellent communication skills and command of English.
• Have affinity with teaching and guiding MSc students.

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

ME is a dynamic and innovative faculty with high-tech lab facilities and international reach. It is a large and versatile faculty where unique connections can be made by combining different disciplines. Its research and education connect fundamental understanding with the design, production, application and improvement of materials, processes and mechanical systems. This is reflected in state-of-the-art education, which trains students to become responsible and socially engaged engineers and scientists.

Conditions of employment

Doctoral candidates will be offered a 4-year period of employment in principle, in the form of 2 employment contracts. An initial 1.5 year contract includes 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.

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.

TU Delft offers a customisable compensation package, discounts on health insurance, and a monthly work costs contribution. Flexible work schedules can be arranged.