Today we spent our morning putting together slides for tomorrow, when groups from Augustana will be visiting. For my part, I looked at the data we gathered from Flossy last Friday, so I could have some nice plots to show. This led to the unfortunate revelation that the precision problem with our pressure transducers are worse than we had thought. Rather than giving use smooth, exponential decays in our data, we're being given saw teeth, where the transducers seem to be binning their readings in 2.5 cm chunks.
Ethan cut the PVC pipe for Flossy in an attempt to get the red dyed water to mix better. We've also added a small pump in the tank to assist in mixing the dyed water with the clear water. Ethan's slides cover the things he's built for Flossy, including the middle divide, and the gutters. Sheiny's slides were about her EC investigation that goes along with the final experiment.
To close out the day, we started another test run. We had a tense moment when we watched the water level creep toward the overflow gutter, but that tension was cut when the water pump shut off, and the water level slowly fell. On the second run though, the water level rose to a similar height, but the sand shifted enough to allow the water to quickly flush through Flossy, creating a great red mess all over the lab.
TO DO: ACQUIRE MOP AND BUCKET FOR FUTURE EXPERIMENTS.
On a good note, no injuries!
We have lots of buckets.
ReplyDeleteDid we ever plot the data from the oscillating buckets? Did it do this binning? Would be good to look at some of it, if we can find it.
Forrest reminded me that we looked at the nice triangles in the bucket. That means that code wasn't binning, so it's something we,very changed. Not enough delay? Faulty continuous mode?
ReplyDeleteThe buckets also had faster flow rates. Those triangles might still have data that looks more or less binned, but similar to the incline portion of our plot posted here. We should still have the data saved, so we can investigate further.
ReplyDeleteAgreed, looking at that is your first task for today!
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