Air is by nature a turbulent fluid, changing speed and direction chaotically. When wind encounters a solid object, its path assumes the form of vortices or eddies.
And the shape of the object influences directly the magnitude of those vortices. So, optimizing the design is an important step to minimize turbulence and to control wind effects on the structure and surroundings.
Let’s see 4 design changes that architects, and engineers use to enhance wind performance.
Taper and set-back form are also used to optimize wind responses. Burj Khalifa, the tallest building on earth, uses both features. Cross sections along the building are made of tapered and setback configuration in a spiral pattern.
It controls the formation of synchronized and organized vortices, minimizing lateral forces and keeps the motion of building within a decent range.
A structural modification that has been popularized in recent years, is the twisted shape. By avoiding simultaneous shedding throughout the height, twisting the form suppresses the dynamic response of tall buildings.
Adding openings to the structures allow the air to bleed through the building, which weakens and disrupts vortex formations.