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.


  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.

  2. Justin,
    That's a great idea - Steve Gough has some examples like this over at the SERC website:

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