present, the wind engineering toolbox consists of wind-tunnel testing
of scaled models, limited full-scale testing, field measurements, and
mechanical load/pressure testing. The evolution of computational wind
engineering (CWE) based on computational fluid dynamics (CFD)
principles are making the numerical evaluation of wind loads a
potentially attractive proposition. This is particularly true
considering the positive development trends in hardware and software
technology, as well as numerical modelling.
success of application of CFD in
aeronautical engineering is very encouraging. Acknowledging the
difference between streamlined and bluff body flows, the use of
computational fluid dynamics for predicting wind effects in the
atmospheric boundary layer appears very promising. This is
particularly so considering the recent advances as mentioned above,
but also the reliable sub-grid turbulence models and numerical
reproduction of inflow turbulence. At this stage of CWE application,
however, a systematic validation of CWE models through comparison
with wind tunnel experiments shall continue to enhance the confidence
and warrant its use for practical applications.
inflow generator technique that can be used as inflow boundary
condition for LES based on synthesizing divergent-free turbulent
velocities. The accuracy of proposed technique to produce turbulent
velocities with proper spectra and coherency function must be
assessed in comparison with typical atmospheric boundary layer (ABL) flow characteristics obtained
from literature. Further, its appropriateness to evaluate wind
induced response for tall building is regarded as the outcome to
employ the proposed technique as inlet boundary condition for LES of
the ABL flow around tall buildings.
scope of this thesis is to adapt 2-3 different approach for
generating the synthetics inflow profiles and evaluate the
computational quality of the different methods, required input
parameter and quality of the generated profiles.
I samarbejde medRamboll