Phase 02 – Day 10 // Monday February 14th 2011
The strategy in this model was to create a strong flow in the tunnel, and then create a space in the corner with shelter. Turbulent should be created in the small space surrounded by walls because of a under pressure from the strong wind flow.
In the first experiment this did not happen because of a big pressure in the tunnel, so the wind did not enter it. Turbulent around the tunnel and in the corners outside the model was created.
In the elevation we can see how the wind moves around the sides of the tunnel and over the tunnel because of the big pressure inside the tunnel. It seems that this pressure creates turbulent over the tunnel.
In the second experiment the wind hits the wall in the front and spreads the wind around the sides. Some of the wind moves through the tunnel, as hoped. The wind in the other side moves into the model structure and creates turbulent. it seems that the pressure inside the structure pushes the wind outside the structure.
In the elevation we can see how turbulent is created over the structure. This could be because of the walls, which now have different heights. We can also see how the wind around the tunnel is being sucked in because of the pressure. In the elevation we can also see how the wind moves through the tunnel in the side.
Phase 02 – Day 08 // Thursday February 10th 2011
Today the assignment was to make three models with 8 elements, six of them connected. Because of pressure of time in the wind tunnel only two of the three models were tested. The models were tested from two sides.
The strategy in the first model was to create different spaces where one of the spaces should be unaffected by the wind. This space was more closed then the others, and has just a small opening. In the other spaces different areas should be unaffected by the wind. It seems that the air is a under pressure in this space, and therefore the wind is being sucked in and creates turbulent. A big area in this model is unaffected by the wind, because of a wall which covers it.
The model was turned 180 degrees and now all spaces was affected by the air. It seems that there is under pressure and overpressure in the spaces and therefore the air is sucked in and turbulent is created.
In the elevation we can see how the wind moves over the walls, but also gets between the walls and a bit turbulent is created. The flow is generally laminar, and the reason for that could be the walls with the same height. The wind in front of the walls is turbulent.
The strategy in this model was to create a space which was not affected by the wind. The slandering walls is placed, so the wind should move around it, and direct the wind around this space. In the first experiment the wind moved into the space, and it seems like the central orthogonal wall is the reason why.
In the first experiment the flow over the model is generally laminar in the front and a bit turbulent in the back of the model. It seems that the orthogonal wall in the front is creating a laminar flow when the wind hits it, and the diagonal wall in the back creates a turbulent flow when the wind hits it.
In the second experiment the wind was also moving into the space. The reason why could be under pressure in this space, so the wind is sucked in through passage.
In the second experiment much turbulent Is created. This could be because of the diagonal wall in the front, and the diagonal walls in the center.
Phase 02 – Day 07 // Wednesday February 9th 2011
Today Phase 02 begun. In this phase we are testing our 3D models in a windtunnel. The first day of this workshop started with testing three of the most inserting models from phase 01. The models were tested from both sides, so we could see the difference in the airflow.
the first experiment with this model the front wall is very affected by the wind. As in the experiment with this model in phase 01, the wind hits the center of the central wall an spreads into two. We can see how the wind is affected by overpressure and under pressure in the way it is turning around behind the walls.
In the second experiment the wall furthest bag is not affected much by the wind. Again we can see how overpressure and under pressure is in this experiment on two of the walls.
In the first experiment there is some areas with lots of air, and some areas with less air. The air hits the diagonal wall in the front, and spreads around the corners. It moves through the walls, and we can see how the airflow is moving around the diagonal wall in the second row. The air is not moving into the area between the walls, where the slanted is furthest bag. This could be because of the slanted wall and the diagonal wall directs the air around this area.
In the second experiment the air is not directed through the walls as in last experiment. In the last test there was a big difference in the amount of air in between the walls. In this arrangement the air is more even in the area in between the walls. The air is “sucked” in because of the arrangement of the walls – there is overpressure and under pressure, and this is also why the air is behaving this way.
Phase 01 – Day 05 // Monday February 7th 2011
It is the last day of phase 01 with experiments, and we are now experimenting with four walls. Today two of the experiments arrangement was optional.
This arrangement is very similar to the arrangement in experiment 09. The air is hitting the central wall and creates a symmetrical pattern around it. When the air is hitting the walls, a straight line along the walls is created.
The air from the hair dryer is creating a straight line between the walls. When the air is hitting the corners a straight line along the walls is created.
This experiment was optional. We tried to arrange the walls so turbulent was created, and it seems like the slanted walls creates turbulent between the walls.
The arrangement of the slanted walls is creating a laminar flow outside the walls, and turbulent in between the walls.
Phase 01 – Day 04 // Friday February 4th 2011
In the first experiment the wind is hitting the second (and central) wall and. The wind is moving around each corner and turbulent is created between the central wall and the wall furthest back, so the salt behind the central wall is removed.
In the second test the wind is hitting the central wall and spreads from the center of the wall. The wind is also hitting the two front walls in the corner closest to the center line of the hair dryer. The wind is moving creating a straight line in front of the wall.
In the third experiment the wind is hitting the central wall, and is spread around each corner. We can see how the wind is directed by the placement of the walls. The slanting wall is guiding the wind up, while the straight wall is guiding the wind to the side.
In the last experiment turbulent was created behind the slanting wall. A flow is created behind the two walls furthest behind.
Phase 01 – Day 03 // Thursday February 3rd 2011
Today the number of walls is increased by one. The placement of the walls is similar to the one yesterday. We decided to experiment with the placement of the walls according to the diagram we were given the first day. This were done by moving the distance between the two walls, so we experimented with three distances between the walls in every experiment.
A short distance between the walls in experiment 05 does not let the air flow back in before the placement of the second wall, so its let with no changes. With a bigger distance between the walls (animation), we could see a small turbulent chance in the corner of the walls, and with a big distance nothing happened with the second wall.
In this experiment we could see how the wind reflecting off the walls helps to guide the rest of the wind in a new direction, and how the placement of the walls have a influence of how much the wind is being guided.
In this experiment the wind is not reflecting off the walls like in experiment 06. The surface which reflects the wind is not as big as in experiment 05 and 06, and this could be a reason why the wind is not reflected off the walls and guides the wind in a different direction. The same is happening in experiment 08.
Phase 01 – Day 02 // Wednesday February 2nd 2011
The workshop has now begun and the first phase is to make observations on aerodynamics. This is done by using a box with a grid bag ground, salt, a hair dryer and a simple wall. The hairdryer is used to blow salt around the wall, and by placing the wall differently in the experiments, we can see how simple aerodynamics works.
In this experiment the hair dryer is blowing in the center of the wall. The salt is first removed in the front of the wall, and then removed around each corner. The pattern is symmetrical around the hair dryers center line, which expected since the obstacle is symmetrical around this line.
In this experiment the wall is moved a bit to the left, so the hair dryer is not blowing in the center of the wall, like in experiment 01. The salt is first removed in the front of the wall, and then it is removed more in the right side, then the left. The pattern is asymmetrical, because the walls center I now moved to the left from the hair dryers center line.
The wall is turned 90 degrees and is placed in the hair dryers center line. The salt is removed in each side of the wall, and the pattern is symmetrical, which was expected since the obstacle is symmetrical around the hair dryers center line.
In this experiment the wall is moved outside the hair dryers center line. The salt is first removed in front of the wall, and then much salt is removed in the side closest to the hair dryers center line, so the pattern is asymmetrical.
During the experiments, it is important to keep camera, the box with salt and the hair dryer is at the same place and in the same position during every experiment. The walls is the only parameter which can be moved. By keeping the camera, the box and the hair dryer in the same position, the evaluation and comparing of the result can be made more systematic.