Editor's Note - It's fun for us to see Steve Spangler in a complete stage of amazement and confusion and obsessed with wanting to learn more about a science demo. We get calls every day from physics professors who all have their unique way to explain this demonstration. Please know that this explanation will evolve over time as we learn more and try to wrap our minds around the science of Laminar Flow.
Steve Spangler was first inspired to recreate this demonstration after seeing Dr. Kevin Cahill, from the Department of Physics and Astronomy at the University of New Mexico, first present this on video. We have contacted Dr. Cahill and hope that we can have him share his explanation.
- See more at: http://www.stevespanglerscience.com/lab/experiments/twist-in-time-laminar-flow#sthash.w6XWDbhH.dpuf
I believe what's happening here is very low Reynold's number laminar flow, which means that there are many parallel layers of "sticky" (or viscous) fluid. As the handle is turned, the dyes remain within their original layers and do not mix with each other, even as they are spread out over their individual layers. As the crank is turned backwards, the process is inverted, and since there is no fluid turbulence in laminar flow, the process can be inverted almost perfectly. - See more at: http://www.stevespanglerscience.com/lab/experiments/twist-in-time-laminar-flow#sthash.w6XWDbhH.dpuf
Editor's Note - It's fun for us to see Steve Spangler in a complete stage of amazement and confusion and obsessed with wanting to learn more about a science demo. We get calls every day from physics professors who all have their unique way to explain this demonstration. Please know that this explanation will evolve over time as we learn more and try to wrap our minds around the science of Laminar Flow.
Steve Spangler was first inspired to recreate this demonstration after seeing Dr. Kevin Cahill, from the Department of Physics and Astronomy at the University of New Mexico, first present this on video. We have contacted Dr. Cahill and hope that we can have him share his explanation.
- See more at: http://www.stevespanglerscience.com/lab/experiments/twist-in-time-laminar-flow#sthash.w6XWDbhH.dpuf
I believe what's happening here is very low Reynold's number laminar flow, which means that there are many parallel layers of "sticky" (or viscous) fluid. As the handle is turned, the dyes remain within their original layers and do not mix with each other, even as they are spread out over their individual layers. As the crank is turned backwards, the process is inverted, and since there is no fluid turbulence in laminar flow, the process can be inverted almost perfectly. - See more at: http://www.stevespanglerscience.com/lab/experiments/twist-in-time-laminar-flow#sthash.w6XWDbhH.dpuf
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