6 papers
Tripping and laminar--turbulent transition: Implementation in RANS--EVM
N. Tabatabaei, G. Fahland, A. Stroh +5
Fundamental fluid--mechanics studies and many engineering developments are based on tripped cases. Therefore, it is essential for CFD simulations to replicate the same forced trans…
Objective barriers to the transport of dynamically active vector fields
George Haller, Stergios Katsanoulis, Markus Holzner +2
We derive a theory for material surfaces that maximally inhibit the diffusive transport of a dynamically active vector field, such as the linear momentum, the angular momentum or t…
Assessment of skin-friction-reduction techniques on a turbulent wing section
M. Atzori, R. Vinuesa, A. Stroh +2
The scope of the present project is to quantify the effects of uniform blowing and body-force damping on turbulent boundary layers subjected to a non-uniform adverse-pressure-gradi…
Global energy fluxes in fully-developed turbulent channels with flow control
Davide Gatti, Andrea Cimarelli, Yosuke Hasegawa +2
This paper addresses the integral energy fluxes in natural and controlled turbulent channel flows, where active skin-friction drag reduction techniques allow a more efficient use o…
A systematic study of turbulent heat transfer over rough walls
Pourya Forooghi, Matthias Stripf, Bettina Frohnapfel
Direct Numerical Simulations are used to solve turbulent flow and heat transfer over a variety of rough walls in a channel. The wall geometries are exactly resolved in the simulati…
Direct Numerical Simulation of Turbulent Channel Flow with Riblets at Low Reynolds Number
Verena Fink, Bettina Frohnapfel
In this report we briefly summarize the set-up and results for direct numerical simulations (DNS) of turbulent channel flows with riblets. The DNS are carried out with OpenFOAM whi…