TY - JOUR
T1 - Large-eddy simulation of flow over a surface-mounted prism using a high-order finite-difference scheme
AU - El-Okda, Y. M.
AU - Ragab, S. A.
AU - Hajj, M. R.
PY - 2008/6
Y1 - 2008/6
N2 - Large eddy simulation (LES) of the flow field over a surface-mounted prism under two different conditions, namely smooth and turbulent inflows, are carried out. A higher-order scheme, in which artificial dissipation is controllable, is used. The simulations are validated through comparison with experimental measurements. The results present new physical aspects and details regarding the development of the primary separation flow on the upwind face of the prism, the development of the horseshoe vortex flow, the primary and secondary separations of the reversed flow on the roof, and finally the locations of the highest suction pressures (in the mean) on the roof and the sides of the prism with respect to the secondary separation lines. The effects of the incident turbulence are determined by pointing out differences in the flow topologies between the two incident flow cases. Based on the validation with the experimental results, the compact upwind difference fifth-order scheme, used here, is recommended for performing LESs of complex flows.
AB - Large eddy simulation (LES) of the flow field over a surface-mounted prism under two different conditions, namely smooth and turbulent inflows, are carried out. A higher-order scheme, in which artificial dissipation is controllable, is used. The simulations are validated through comparison with experimental measurements. The results present new physical aspects and details regarding the development of the primary separation flow on the upwind face of the prism, the development of the horseshoe vortex flow, the primary and secondary separations of the reversed flow on the roof, and finally the locations of the highest suction pressures (in the mean) on the roof and the sides of the prism with respect to the secondary separation lines. The effects of the incident turbulence are determined by pointing out differences in the flow topologies between the two incident flow cases. Based on the validation with the experimental results, the compact upwind difference fifth-order scheme, used here, is recommended for performing LESs of complex flows.
KW - Free stream turbulence
KW - Large-eddy simulation
KW - Surface pressure
KW - Surface-mounted prism
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U2 - 10.1016/j.jweia.2007.06.017
DO - 10.1016/j.jweia.2007.06.017
M3 - Article
AN - SCOPUS:44649176415
SN - 0167-6105
VL - 96
SP - 900
EP - 912
JO - Journal of Wind Engineering and Industrial Aerodynamics
JF - Journal of Wind Engineering and Industrial Aerodynamics
IS - 6-7
ER -