Science World–Stream Table—-#4 blog
Feb 10th, 2012 by HUA WU
As we said last week, we have obtained the grit from Science World and have begun doing experiments on with the grit to optimize our design. The experiments included the following procedures:
We put the grit and some water into a box, and tried to experiment different ways to pack of the grit into a shoreline formation. We found that when the grit was wet, it was much easier to compact into a shoreline and was more resistant to the waves. Because this plastic is a non-wetting surface, some particles would float until the water surface was broken. Although this is not ideal when installing and changing the grit, we do not believe that it will pose a significant problem in the operation of the exhibit.
(Making waves to create shoreline)
We varied the wave intensity from gentle to violent and discovered that as we increased the wave intensity, the grit was not compact enough to withstand the stronger wave action. We also simulated different scenarios by positioning different objects between the grit and the waves. Unfortunately, the objects we used were too small to have a significant impact on the erosion of the shoreline. We plan to continue these experiments with larger objects through the weekend.
We also experimented with different wave angles and discovered that by varying the angle, different shoreline patterns can be created. A curved shoreline was created due to concentrated erosion from angled waves. We concluded that each of these scenarios would erode the shoreline in different ways. These experiments also confirmed that when wet, the grit is very sticky and hard to remove from users’ hands, which was a major issue with the original design. To resolve this, we decided to install a vented Plexiglas covering and install levered paddles to create the waves.
(Shoreline created by angled waves)
In addition to experimenting with the grit and final design, our team began designing an informative poster that would mount to the sides of the table. The poster describes coastlines and coastal erosion, in addition to techniques to prevent such erosion. The poster is simply a template for Science World as they have a specific graphic sign template for exhibits.
( Sketch map )
We also contacted our client and they were satisfied with our designed strategy. They were interested in our wave concepts. And they are also open to other ideas including our drainage system and poster changes.
You’ve got some great ideas here! Have you experienced any surprises during your experiments?
Although not necessary for CIVL 202, would you be able to send me a copy of your final documents that you will be giving to Science World?
Regards,
SN