Differences between the results from modelling and field data are most probably caused by variables such as coastal plain roughness (buildings, trees), microtopography, particle shape, and boulder collision during transport that are summarised as coefficients in the mathematical models.
Although the height and land use pattern of the ground surface are digitized and have been utilized as the geological information system, the aerodynamic effects of roughness including buildings and trees are most important in wind engineering.
Values for time-dependent inlet conditions, as well as values for the roughness of surrounding buildings, are identified with measurements carried out around the CREATE Tower.
"We are keen to make a contrast between the modern, polished architecture of our interventions and the raw roughness of the existing building," says Ricard, "rather than attempt a kind of pastiche".
This paper discusses the possibilities to evaluate the aerodynamic roughness of a homogeneous building group by experiments or by analytical models.
Previous studies analysed the influence of position on the building facade, roughness, wind speed, wind direction, local airflow pattern and surface-to-air temperature differences.
The surface roughness attached on all building walls was: uniform roughness of maximum size equal to 0.21 m in full scale, and three kinds of balconies of 0.63, 1.25 and 2.5 m wide without mullions, and 0.63 m wide balconies with mullions.
The physical model was a 1 50 scale idealization of the town Seaside, Oregon, designed to observe the complex tsunami flow around the macro-roughness such as buildings idealized as impermeable, rectangular blocks.
The roughness of the environment of the building under consideration is taken into account, but not adjacent buildings.
