scart.dlr.de>Research Projects
Friday, 14. December 2018
 

Direct Numerical Simulations and Large Eddy Simulations of turbulent pipe and channel flows

Turbulent pipe flows occur in many technical applications. The pressure drop and the noise generation produced in complex pipe geometries, such as orifices, bifurcations, expansions and bends, are of particular interest. Numerical simulations using Computational Fluid Dynamics (CFD) methods which are based on solutions of the Reynolds-averaged Navier-Stokes equations (RANS) do not provide reliable prediction of the turbulent transport processes and the generated noise. Therefore, highly accurate techniques like Direct Numerical Simulation (DNS) and Large-Eddy Simulation (LES) are applied in order to validate RANS results and improve the physical understanding of the involved mechanisms.

Contours of the instantaneous stream wise velocity component obtained from Direct Numerical Simulation of a turbulent pipe flow for a Reynolds number Re = 35000.
Contours of the mean streamwise velocity (top) and distribution of the turbulent kinetic energy (bottom) obtained from Direct Numerical Simulation of a turbulent flow in a pipe with two diaphragme.

Contact:

Christian Bauer
German Aerospace Center (DLR)
Institute of Aerodynamics and Flow Technology, Department Ground Vehicles
Göttingen
Phone: +49 551 709-2132

 
German Aerospace Center (DLR), Institute of Aerodynamics and Flow Technology, SCART
Bunsenstraße 10, 37075 Göttingen, Germany