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.
Large-eddy 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.
Keywords: wind loads, wind
tunnel test, published data, CFD method, LES (Large Eddy Simulation) model
Author: I Gede Adi Susila
Journal Code: jptsipilgg090002
