Fluid Dynamics and Turbulence

Sketch of a nozzle

Nozzle with shape parameters to be optimized

In nature and technological applications, fluid-induced transport of mass, momentum and energy happens mostly in a transient manner. Due to the high complexity of unsteady flows, there are difficulties with high-resolution measurements of the occurring flow patterns. Therefore, this topic is way more prominent in reasearch than in development and design.

This research group is therefore mainly focused on expanding the knowledge base for turbulent flows using appropriate test benches and numerical simulations and on modeling the relevant processes, thereby contributing to a better understanding of turbulent dynamics. In applied research, the gained knowledge and expertise are used for the solution of challenging and practically important unsteady flow problems.

  • Untersuchungen zur Flüssigkeits-Gastrennung und Diffusion unter Anwendung poröser Medien bei kompensierter Gravitation

    (Third Party Funds Single)

    Term: 1. January 2017 - 31. December 2019
    Funding source: Bundesministerium für Wirtschaft und Technologie (BMWi)

  • Virtual Engineering in der Entwicklung und Optimierung von statischen Zerstäubungsdüsen für die Niederdruckreinigung filmischer Verschmutzungen

    (Third Party Funds Single)

    Term: 1. June 2016 - 31. May 2018
    Funding source: Bundesministerium für Wirtschaft und Technologie (BMWi)

Among the currently or recently studied topics there are:

  • agravic diffusion processes
  • multiphase-bubble flows
  • remedies against spurious oscillations in bubble simulations
  • multiphase-impinging flows
  • nozzle optimization for cleaning applications
  • simulation of novel wind turbine designs
  • shape optimization using genetic algorithms

Within this research area, experimental as well as numeric studies are conducted. Among the former, most notably are measurements and flow visualisations in flow tunnels. At LSTM, a water tunnel, a wind tunnel and an oil tunnel with adapted refractive index are available. As very low turbulent intensities can be preserved, these flow tunnels cover a wide range of practical applications. The research group also can offer a lot of expertise in the field of non-invasive optical measurement techniques. Using numerical simulations based on proprietary, open-source or in-house CFD codes, the experimentally obtained results can be reproduced and the numerical  model be used for design studies.