Modelling Thermal-hydraulic Effects of Fluid Streams Mixing – MRes Scholarship

Modelling Thermal-hydraulic Effects of Fluid Streams Mixing

Location: Nuclear Futures Institute, School of Computer Science and Electronic Engineering

Project ID: BUK2E090
Annual Stipend: £11,937
Application Deadline: 12/12/2022

Thermal-Hydraulics (TH) plays a key role in the performance analysis of any power system, particularly in the nuclear power generation sector. Therefore, in order to ensure that the system operates properly, highly validated simulation tools are required among the CFD code (e.g., Fluent, OpenFoam, etc.).

The project will focus on the temperature fluctuation in the turbulent coolant flow that can induce fluctuating thermal stress in pipe walls resulting in high cycle thermal fatigue. This phenomenon is a major challenge in any power system. In the nuclear sector, several incidents at the Civaux (France), Tsuruga-2 and Tomari-2 PWRs (Japan) NPPs are an example.

In a typical power system, many locations are susceptible to thermal fatigue (such as T-Junction with upstream elbows and U-bends). However, a location of particular interest is the T-junction, where the main cold stram meets a hot stream injection. Several numerical studies were performed to study the impact of a thermal transient upon this thermal mixing zone. It was found that a thermal transient, alongside high wall thermal inertia, leads to conditions with large temperature and density gradients, which result in the formation of a reversed secondary flow. This project will focus on designing and implementing an experimental programme relevant to this phenomenon in the THOR facility. The goal of the project will be to observe the secondary flow under broad parameter space (i.e., pressure, temperature, flow velocity).

The scholarships are sponsored by Jacobs. Jacobs is an international technical professional services firm. The company provides engineering, technical, professional and construction services, as well as scientific and speciality consulting for a broad range of clients globally, and operates across various industrial sectors.

Applicants are expected to hold a BSc degree equivalent to a UK 2.1 in engineering or natural sciences, preferably with knowledge of fluid dynamics. To apply for this studentship, please e-mail a CV, a degree transcript and a covering letter detailing your motivation and experience with research, along with one reference letter to Dr Margulis and a copy to Penny Dowdney The closing date for applications is 12/12/2022. Successful applicants would be able to start the degree on or before December 2022. For enquiries, please e-mail

KESS 2 East is a pan-Wales higher-level skills initiative led by Bangor University on behalf of the HE sector in Wales. It is partly funded by the Welsh Government’s European Social Fund (ESF) convergence programme for East Wales.

Due to ESF funding, eligibility restrictions apply to this scholarship. To be eligible, the successful candidate will need to be resident in East Wales on University registration and must have the right to work in the region on qualification.