Archive for the ‘Videos’ Category

Hmmm, laminar reverse doughnuts (I mean, flooww)

August 5, 2007

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So have you ever wondered why those bands in Jupiter exist? More to the point, why they don’t go away? Shouldn’t they just mix together into one gaseous cloud? Well, the answer could be laminar flow. Laminar just means non-mixing flows. It actually does occur here on Earth. Flows of water, such as in rivers or oceans, where there is a difference in temperature and salt concentrations will barely mix. This can be demonstrated in the lab. The linked video actually shows laminar reverse flow. Basically three blobs of colored corn syrup are placed between two cylinders (one inside the other). The space between the cylinders has been filled with clear syrup. The inner cylinder is then turned to “mix” the three blobs in one direction, then turned in the reverse direction to un-mix. The video can be found here and a more detailed explanation can be found here. Warning to those of us who use dial-up, this vid does take a few minutes to download, but I think worth it.

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