Logo by Kaliyuga - Contribute your own Logo!

END OF AN ERA, FRACTALFORUMS.COM IS CONTINUED ON FRACTALFORUMS.ORG

it was a great time but no longer maintainable by c.Kleinhuis contact him for any data retrieval,
thanks and see you perhaps in 10 years again

this forum will stay online for reference
News: Visit us on facebook
 
*
Welcome, Guest. Please login or register. August 24, 2019, 05:52:29 AM


Login with username, password and session length


The All New FractalForums is now in Public Beta Testing! Visit FractalForums.org and check it out!


Pages: [1]   Go Down
  Print  
Share this topic on DiggShare this topic on FacebookShare this topic on GoogleShare this topic on RedditShare this topic on StumbleUponShare this topic on Twitter
Author Topic: self-moving active fluids  (Read 1376 times)
0 Members and 1 Guest are viewing this topic.
kram1032
Fractal Senior
******
Posts: 1863


« on: June 22, 2015, 06:00:42 PM »

http://www.nature.com/nature/journal/v519/n7544/full/nature14272.html
This amazing work has fluids of varying surface-tension attract and resist unification. This effectively can be used to do computations with fluids without using any kind of motor at all. (This is not perpetual motion: The necessary energy is stored in the droplets and the process comes to a halt when, eventually, the individual droplets DO mix)

There are a bunch of really nice suplemental videos to the paper. 9 in total but I'll link the four most interesting ones:
http://www.nature.com/nature/journal/v519/n7544/fig_tab/nature14272_SV1.html
http://www.nature.com/nature/journal/v519/n7544/fig_tab/nature14272_SV5.html
http://www.nature.com/nature/journal/v519/n7544/fig_tab/nature14272_SV6.html
http://www.nature.com/nature/journal/v519/n7544/fig_tab/nature14272_SV9.html

If nothing else, watch those four videos.
Logged
Chillheimer
Global Moderator
Fractal Schemer
******
Posts: 972


Just another fractal being floating by..


chilli.chillheimer chillheimer
WWW
« Reply #1 on: June 22, 2015, 06:56:56 PM »

 shocked

is this "awesome"-week or what?  cheesy

I don't really understand why this is happening.. what exactly is the source of motion?
I understand how 2 drops attract or repell each other. but not that one drop is attracted by another that is repelled, so it ends in a chase.. why? how? what the....?

We demonstrate experimentally and analytically that these droplets are stabilized by evaporation-induced surface tension gradients and that they move in response to the vapour emitted by neighbouring droplets.
i guess that's why. but i don't understand..
Logged

--- Fractals - add some Chaos to your life and put the world in order. ---
kram1032
Fractal Senior
******
Posts: 1863


« Reply #2 on: June 22, 2015, 11:49:52 PM »

Apparently, evaporation-"force" is stronger than solar or wind.
Here's a mini car driven by evaporation:
<a href="https://www.youtube.com/v/xeLD8u-z-Wg&rel=1&fs=1&hd=1" target="_blank">https://www.youtube.com/v/xeLD8u-z-Wg&rel=1&fs=1&hd=1</a>
Presumably, those droplets work the same way, except their entire body is their engine. (Or, well, at least their surface is)
Logged
jehovajah
Global Moderator
Fractal Senior
******
Posts: 2749


May a trochoid in the void bring you peace


WWW
« Reply #3 on: October 24, 2015, 10:36:13 AM »

https://m.youtube.com/watch?v=QXrS5HJwMBY

Fluid mechanics or dynamics contains many less well known phenomena, which have been initially explored but not applied .
Surface Tension is one of those boundaries we know a lot about mathematically and physically but we have only used in a few applications.

The key point Chillhelmer is to revise your notions of matter, and I recommend adopting a fluid dynamic paradigm to do so. Then you can make the intuitive leap that all surfaces are active .

The viscosity and the momentum of that activity is captured in the Rayleigh number. This provides a scaled way of understanding fluid behaviours. By that I mean the same behaviours at different scales appear very different!

Thus a surface of a solid appears rigid, but in fact it is not. It has a very high viscosity but is still active . Glass for example flows very slowly.

The forces and energies in these boundary surfaces are phenomenal. It is only now we are beginning to find out how to tap into them.

Where fractals come into the picture is precisely in relation to the Rayleigh number. This is a scale free device that allows us to apply iteratively certain forms to all scales just as in a fractal . We then calculate the physical measurement to be expected in the predicted behaviour by truncating the iteration appropriately.

Wada basins,Van De Wahl forces etc all can be modelled by a fractal topology. The Casmir forces fall into this category also.essentially "magnetic" behaviours are a way of describing these fractal topologies as they behave.

I am not now claiming space is fractal, not any more. Our measurement topologies are best applied fractally to space-like objects and regions.
Logged

May a trochoid of ¥h¶h iteratively entrain your Logos Response transforming into iridescent fractals of orgasmic delight and joy, with kindness, peace and gratitude at all scales within your experience. I beg of you to enrich others as you have been enriched, in vorticose pulsations of extravagance!
Pages: [1]   Go Down
  Print  
 
Jump to:  

Related Topics
Subject Started by Replies Views Last post
moving up Mandelbulber Gallery taurus 0 524 Last post May 06, 2011, 11:12:12 AM
by taurus
Active Season Images Showcase (Rate My Fractal) Pauldelbrot 2 594 Last post May 31, 2014, 06:49:05 PM
by Pauldelbrot
Fluids feature request sikerow 7 661 Last post May 16, 2015, 04:59:29 PM
by youhn
Active MB3D Develoment stopped from my side Mandelbulb 3d « 1 2 3 » thargor6 38 7452 Last post December 07, 2017, 08:44:06 PM
by mancoast

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines

Valid XHTML 1.0! Valid CSS! Dilber MC Theme by HarzeM
Page created in 0.115 seconds with 28 queries. (Pretty URLs adds 0.008s, 2q)