Turbulence and combustion

  • DNS, LES, RANS turbulence modeling methods
  • Statistical analysis of turbulent flows
  • Turbulent combustion
  • Turbulent flow in complex geometries
  • Flow instability
  • Engine flows

Exemplary topics

The main focus of this PhD-project is the application of new conservation laws for viscid and inviscid helical flows to turbulence. In view of the turbulence application helically symmetric turbulence is placed between the fully 3D turbulence, which determines our classical knowledge of turbulence, and plane 2D turbulence, which is rather distinct. Similar to 3D turbulence, helical turbulence admits a three-dimensional velocity field and, most important, the vortex stretching term in the vorticity transport equation responsible for the generation of small scales can be identified. Nevertheless, helical flows live on a 2D manifold, somewhat analogous to plane 2D turbulence. Employing a simulation code especially designed for simulating helical flows in the BoSSS framework we intend to answer exactly the key question in how far helical turbulence is closer to 2D or to 3D turbulence or in other words if helical flows have a preferential to transfer energy from small to large scales or vice versa.

Contact: Dominik Dierkes, M.Sc.

The objective of the project is to investigate the thermodynamic behavior of electrolyte solutions whose constituents react to form solids. Particularly, we are interested in modeling the thermodynamic behavior of calcium carbonate supersaturated solutions. For this purpose, we perform numerical simulations in commercial fluid dynamics softwares and compare the results with experimental information.

Contact: Dr. Martina Costa Reis

The focus of our research is on turbulence characteristics in a turbulent plane jet, studies of which can be divided in two categories: theoretical and numerical studies. In this research, we are developing different theoretical frameworks to study turbulence such as Lie group theory for one and two-point equations of motion for a plane jet. We are also using the direct numerical simulation (DNS) to provide further insights into physics of turbulent jets.

Contact: Dr. Hamed Sadeghi