The physics of stripe patterns in turbulent channel flow determined by DNS results

Publikationstyp
Journal Article
Date Issued
2015-11-24
Sprache
English
Author(s)
Kiš, P.  
Jin, Yan 
Herwig, Heinz  
Institut
Technische Thermodynamik M-21  
Thermofluiddynamik (M-21H)  
TORE-URI
http://hdl.handle.net/11420/6225
ArXiv ID
1511.07753v1
Publisher
Cornell University
The turbulent flow in an infinitely extended plane channel is analysed by solving the Navier-Stokes equations with a DNS approach. Solutions are obtained in a numerical solution domain of finite size in the streamwise as well as in the lateral direction setting periodic boundary conditions in both directions. Their impact on large scale structures in the turbulent flow field is analysed carefully in order to avoid their suppression. When this is done appropriately well known stripe patterns in these flows can be observed and analysed especially with respect to their relative motion compared to the mean flow velocity. Various details of this stripe pattern dominated velocity field are shown. Also global parameters like the friction factor in the flow field and the Nusselt number in the temperature field are determined based on the statistics of the flow and temperature data in a very large time period that guarantees fully developed turbulent flow and heat transfer.
Subjects
Fluid Dynamics
DDC Class
530: Physik
600: Technik
620: Ingenieurwissenschaften