In the last phase I worked in Tim’s group with the pavillion we later called “Current”.
It has a very rhythmical and shape marked by the slabs with sharp angles repeated down the “spinal column”. The many inclined lines and pointy angles gives it a characteristic expression.
We worked together on the interlocking mechanism of the large slabs and with rounded H-joints between the smaller pieces. The “head” or front part of the structure and the smaller wall beside it went through some changes to optimize the wind strategy. Another feature was to utilize as much of the 122*122 cm slab as possible, so the main parts are made of the same slab, as shown below.
An attempt to use grashopper for the joints and subdivision of the walls. The horizontal joints should always be aligned to the dividing horizontal slabs, they need to be rotated so that they have lowest drag possible.
The definition can change the shape of the wall moving the point at it’s corners, to adjust the size of the joints and number of subdivisions. The GH model is only a principle of how it could work, made in 2D. It could be worked on to create files ready to fabrication by applying the system throughout the structure, intersecting and subtracting the breps to make the cuts for the joints and orienting them onto the xy plane, spacing properly.
PinUp 3 22/2
This is my poster from PinUp3, and below an additional image of the final design.
PinUp 2 15/2
– The structure needs to be stable and strong to resist the forces of the wind. The elements need to be connected together to support each other and together make a strong construction. Therefore the joints also need to be robust and more industry like.
– We should aim to give every element a double function – in connection to the wind strategy and also as a structural member; then all elements are necessary and the design form a whole.
– The structure needs live up to the demands of the strategy – every element should have a clear role. At the same thing the spaces it defines and it’s overall expression need to be interesting too.
The images below are the poster from PinUp2.
In the wind tunnel I experimented with some different kinds of lamella.
The “radial” ones are better for leading the wind in a certain direction than the parallel ones.
Phase 02 9/2
In phase 02 the experiment kit is upgraded from a hairdryer to a wind tunnel. Some of the setups from phase 01 are repeated in the tunnels to get a more detailed understanding of how the wind behaves.
Pin-Up 1 8/2
–Air shapes air. Parts of the patternes of how the air behaves are a result of air accumulation in some pressure zones. The accumulated air is an obstacle for the airflow, and so the whole arrangement changes or develop over time. (It’s visible event in the first experiment with a single wall, two spots are blown away as the air avoids the air-pad just in front of the wall.)
–The environment is a whole, where all the parts have an influence and therefore must be considered every time. Their impact might be unclear or indirect, but maybe it can be verified by moving or removing some of the walls (while the rest is unchanged)
– Change one parameter at a time to get some clear and logical experiments. Small changes gives an understanding of how and in what extent one parameter (for example positioning or rotation of a wall, wind speed) influence the output.
– The air can be seen as part of the space. When setting up some walls in an arrangement we are not only making some spacial organization of some fixed, solid structures but also organizing or setting up some airflows, that fill out the spaces in between. The wind is in movement all the time, it contributes to the space with some contrasts, such as sheltered or windy zones.
The images below are from the poster for Pinup1 (click to enlarge). They are an overview of the experiments each day 1-4.
Experiment with many turbulences
In one of the experiments of day 3, as a continuation of the one below, a third wall was placed behind the gap.
When the space between the front walls and the rear walls was large (6cm) or small (2cm) there were no turbulence. The air could pass freely by the rear wall or it was pressed through the small “tunnel” space ad flew to the sides.
In the dictance of 4cm the air seemed to bounce of the rear wall, it’s track turning back towards the front walls, eventually runnig round in a whirl. Apparently it seems that the spatial relation of the two walls has a great influence on the turbulences.
The setups shown in the diagrams have all walls displaced with 2 cm and a gap of 2cm.
Turbulence between the front and middle wall.
Some interesting turbulences occurred in that setup. The fenomena of turbulence occurs at high windspeedes. It was evident to see how the salt grains kept running around in a circle, caught in the whirl.
Below is a rouhg sketch of how it looks like…
Observation made on two walls with a gap between them.
The two pieces of cardboard (5cm) are 1cm apart from eachother. On the other photo is for comparision – it shows the same setup with only one of them. (click to see the images bigger)
The airflow apparently spreads more out, when it is forced through the small gap. The “track” on the salt goes in more of a curve round the back of the cardbord walls. The difference of pressure on the windy and the sheltered side of the wall might have been bigger on the dubble-wall than on the sigle one.
This is the 1st eksperiment, 2nd day. The front wall shelters the other one, so the “track” on the salt is similar to the one of the 1 eksperiment of 1st day…
Though, this is the best picture I have of the triangle the sometimes appears in front of such a wall perpendicular to the wind. Anybody have a good explenation??