Master‘s thesis: Investigation of Inflow Conditions for Aeroacoustic Applications in Nek5000
Background: An accurate inflow condition is crucial for obtaining reliable results for turbulent flows. These inflow conditions must replicate the physical behavior of the flow at a given Reynolds number. However, traditional methods for generating these inflow conditions, such as the synthetic eddy method (SEM), often introduce artificial fluctuations into the pressure field. This generates spurious sound sources which can interfere with the accurate prediction of acoustic pressure. Artificial pressure fluctuations at the inflow result in spurious sound sources at the inlet for the precursor, Reduced order model (ROM) and the synthetic eddy method
The proposed project aims to investigate and develop alternative methods that not only reproduce the instantaneous inflow velocity in accordance with the required Reynolds number, but also minimize the artificial pressure fluctuations. The goal is to create an inflow condition that is acoustically silent, thereby ensuring that the inflow condition itself does not contribute to sound generation.
Specific tasks:
- Literature study on the topics of silent inflow conditions
- Installing and running initial cases with Nek5000
- Implementation of new boundary conditions in Nek5000
- Simulations using high-performance computing resources
- Data analysis and reporting of the results
Requirements:
- Experience and interest in high-performance computing and turbulence
- Programming experience in Python and/or Matlab
- Experience with legacy simulation codes (Fortran 77) is beneficial
- Independent working style
Starting date: Immediately
Advisors:
