TY - JOUR
T1 - Turbulent flow around a wall-mounted cube
T2 - A direct numerical simulation
AU - Yakhot, Alexander
AU - Liu, Heping
AU - Nikitin, Nikolay
N1 - Funding Information:
This work was supported by the Israel Science Foundation Grant 159/02 and in part by the CEAR of the Hebrew University of Jerusalem. The third author (NN) was also partially supported by the Russian Foundation for Basic Research under Grant 02-01-00492. The first author (AY) wishes to express his appreciation to Profs. S. Sukoriansky and V. Yakhot for valuable discussions. Our special gratitude goes to the IUCC – the Inter-University Computation Center, Tel Aviv, where the numerical simulations have been carried out on Cray SV1 supercomputer.
PY - 2006/12/1
Y1 - 2006/12/1
N2 - An immersed-boundary method was employed to perform a direct numerical simulation (DNS) of flow around a wall-mounted cube in a fully developed turbulent channel for a Reynolds number Re = 5610, based on the bulk velocity and the channel height. Instantaneous results of the DNS of a plain channel flow were used as a fully developed inflow condition for the main channel. The results confirm the unsteadiness of the considered flow caused by the unstable interaction of a horseshoe vortex formed in front of the cube and on both its sides with an arch-type vortex behind the cube. The time-averaged data of the turbulence mean-square intensities, Reynolds shear stresses, kinetic energy and dissipation rate are presented. The negative turbulence production is predicted in the region in front of the cube where the main horseshoe vortex originates.
AB - An immersed-boundary method was employed to perform a direct numerical simulation (DNS) of flow around a wall-mounted cube in a fully developed turbulent channel for a Reynolds number Re = 5610, based on the bulk velocity and the channel height. Instantaneous results of the DNS of a plain channel flow were used as a fully developed inflow condition for the main channel. The results confirm the unsteadiness of the considered flow caused by the unstable interaction of a horseshoe vortex formed in front of the cube and on both its sides with an arch-type vortex behind the cube. The time-averaged data of the turbulence mean-square intensities, Reynolds shear stresses, kinetic energy and dissipation rate are presented. The negative turbulence production is predicted in the region in front of the cube where the main horseshoe vortex originates.
KW - Direct numerical simulation
KW - Immersed-boundary method
KW - Negative turbulence production
KW - Turbulence
UR - http://www.scopus.com/inward/record.url?scp=33749555126&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatfluidflow.2006.02.026
DO - 10.1016/j.ijheatfluidflow.2006.02.026
M3 - Article
AN - SCOPUS:33749555126
SN - 0142-727X
VL - 27
SP - 994
EP - 1009
JO - International Journal of Heat and Fluid Flow
JF - International Journal of Heat and Fluid Flow
IS - 6
ER -