Saturday, November 02, 2013

More Emflume high speed

I've uploaded a few more videos of LRRD's "Emflume" in operation. The potential for amazing slow-motion sediment transport and fluid dynamics visualizations with this thing are endless.

gx8 1917-Emflume9-sed-trans from Matt Kuchta on Vimeo.


gx8 1917-Emflume6-sed-trans from Matt Kuchta on Vimeo.


gx8 1917-Emflume7-paddle from Matt Kuchta on Vimeo.


Flow over an obstruction in the LRRD "Emflume" from Matt Kuchta on Vimeo.
1000 fps, flow velocity ~1m/s

gx8 1917-Emflume10-paddle from Matt Kuchta on Vimeo.

gx8 1917-Emflume11-sedtranstest from Matt Kuchta on Vimeo.
Sediment transported through the Emflume, Note the fine strath (red) covered by a traction carpet. Saltating and supspended load also visible.


The only thing I would wish for in the design is a little more working room so that you can develop bedforms like climbing ripples, laminations, and antidunes, although I didn't get a lot of time to putz around with the flume itself, so it might already have these capabilities by adjusting some of the parameters more carefully.

2 comments:

  1. I'm making a request for an example of what kayakers would call a hole or hydraulic. Upstream directed circulation near the water surface and how that looks at slow motion with transport of particles that have negative, neutral, and positive buoyancy.

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  2. Justin,
    That's a great idea - Steve Gough has some examples like this over at the SERC website: http://serc.carleton.edu/details/files/19075.html

    But getting more examples of whitewater kayaking situations sounds like a fun challenge.

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