WIND LOAD PREDICTING; HOW COULD CFD REPLACED WIND TUNNEL TEST

Abstract

Computational Fluidal Dynamic (CFD analysis) is highly pointed to
solve a number of wind tunnel test problem on the computer simulation. Largeeddy
simulation (LES) technique with the Smagorinsky eddy-viscosity model has
been applied in order to predict pressure coefficients for 3-D domes and catenoid
models.
“Fluent” has been used to analyze the flows. Published data of Maher and the
ASCE have been used as the basis guideline to enable wind loading to be applied
appropriately. Result of LES computations are compared with those from laminar
models as well as those from turbulent models based on Reynolds–average Navier-
Stokes equation (RANS model) and those from experiment. The numerical
experiment results for all models with various configurations to be exited by the
turbulent wind forces were identified. The LES results from 3D computational
agreed very well with the experimental or published data. For the dome case of
h/d=1/2 ratio, the result can be sort it out into the maximum positive Cp=+0.621
and the maximum negative in the centre of dome is Cp = -1.2. The coefficient
offered was quite similar to the published data of Cp=+0.6 and Cp=-1.0,
respectively.
CFD has been shown to a reasonable prediction of wind pressure distributions. It
conceivably could replace some wind tunnel tests.