Slashdot Mirror
Scientists Make Water Run Uphill
redshadow01 writes to mention a BBC story about scientists flouting the laws of physics for fun, and profit. From the article: "The US scientists did the experiment to demonstrate how the random motion of water molecules in hot steam could be channelled into a directed force. But the team, writing in Physical Review Letters, believes the effect may be useful in driving coolants through overheating computer microchips."
Scientists also noticed the older water samples flowed uphill, both ways.
In the snow.
There's nothing Intelligent about Intelligent Design.
So what, they've been doing that at Knott's house of mystery for the past like what, 20 years?
I know how to make water travel uphill:
Step 1: Stand up.
Step 2: Find an incline.
Step 3: Walk up said incline.
Warning: Step 1 and Step 3 should not be performed by anyone who even knows how to properly type in the URL to this website without first consulting a physician. Doing so may cause undesired effects such as loss of breath and/or time spent away from the internet.
Ginga no Rekshiya Mata Each page.
1. Flaunting the laws of physics
2. ???
3. Profit!
Yes, I am the one with the legendary sig.
Too bad only intel CPU's run hot enough for steam cooling to be viable.
I wonder if the same principle could be applied to hovercraft.
If you like what I've said here, and want to read more, go to http://www.krillrblog.com
How come BBC makes this a news this late? I remember seeing stuff about this weeks ago, tho I don't remember where.
Doesn't matter, as the saying goes, no news is good news.. oh wait, I meant, no news is old news rerun.
-Is the meaning of life vanity, or is vanity the meaning of life?
http://www.wsu.edu/~brians/errors/flaunt.html ("To flaunt is to show off: you flaunt your new necklace by wearing it to work. "Flout" has a more negative connotation; it means to treat with contempt some rule or standard. The cliché is "to flout convention." Flaunting may be in bad taste because it's ostentatious, but it is not a violation of standards.") (That is all.)
Has Maxwell's demon been discovered?
I pretend to know more than I really do by mooching off google and wikipedia.
Now if they could find a way to do the same with shit.
...it is using them in a clever way. Doesn't the writer appreciate that inventing stuff is cool?
Now you only get steam above 100 degrees celcius. Meaning you chip must be literally cooking before this effect sets in.
A bit too late perhaps?
Well offcourse you could use liqueds with lower boiling temps but then it wouldn't be water flowing up hill anymore now would it.
Nice idea but I think I just use a pump rather then waiting for the cooling to set in only after my cpu is glowing red.
MMO Quests are like orgasms:
You may solo them, I prefer them in a group.
So ... now Riven is fair game for LARPers?
you engrave every surface that you are going to travel over with .3 mm saw-tooth-shapped groves.
Could be a little difficult on, say, the Atlantic Ocean.
Prediction for end of Universe #42: Fencepost error in Quantum_bogosort.cpp
The US scientists did the experiment to demonstrate how the random motion of water molecules in hot steam could be channelled into a directed force
Thats so awesome! Maybe we can use that force push trains or something!
It's conspicuously showing off the ability to exploit physical properties so that they appear to go against the laws, but don't really. I don't think they are showing contempt for the laws, just showing that things aren't as simple as they seem.
Mayday! Mayday! Mayday!
Amelia "Damn that was a bad idea" Earhart
Using this amazing pow0r of making water run uphill, we could significantly improve the techology of the human race.
No discussion of water flowing uphill can go without mention of M.C. Escher's Waterfall and Dyson's fantastic real world recreation (and there's a good explanation of Dyson did it at the BBC.
There are shills on slashdot. Apparently, I'm one of them.
When will scientists get around to what's really important? When will they make hot snow fall up?
Normality is now: overrated.
Whitesides made water run uphill 14 years ago! He used a different "trick" though: he made a surface that was very hydrophobic on one side, and very hydrophilic on the other. A drop of water feels this gradient and moves towards the hydrophilic side, even if it happens to be uphill. The energy comes from the surface tension of the drop (it relaxes as it moves).
http://adsabs.harvard.edu/abs/1992Sci...256.1539C
The moment i saw the headline my mind came to Escher, showing us water floating upwards in the painting http://www.petergh.f2s.com/waterfall.jpg Now let's wait for the real life implementation of the ever-rising stairs...
/(bb|[^b]{2})/
Pah, the British have beaten the Americans by over a year with this trick and not in a small way too. These Americans can only show it in a lab. The Brits have been making water features for in a garden, where water flows uphill. Derek Philips, working for James Dyson (of the vacuum cleaner that never fails to suck), invented this and presumably they have patents.
http://news.bbc.co.uk/2/hi/uk_news/3046791.stm
Use Adsense for Charity
That Dyson only creates the illusion of water flowing uphill. This is the real deal, the water really does move uphill.
Archimedes made water flow up hill thousands of years ago.
Clearly either a joke or trolling.
... laws flaunt you!
Except the American version actually flows uphill, and Dyson's version is just an illusion. Thanks for playing, though.
This isn't news.. Last year someone did this at the largest gardening show in the UK. She had the water going uphill to add a major "water feature" to her design. Didn't get much press but unless theBBC just reversed their film it seemed pretty real to me.
I like muppets.
This is all very nice, but then the scientist go and say this will 'help cool computer chips'. This it will never do, and I >hate itjust below the onset of film boiling (i.e. when this phenomenon does not occur) is well known to represent to the point of optimum heat transfer. Once film boiling comments, the heat transfer coeffiecient for the surface declines drastically (basically because the density of the coolant in contact with the hot surface declines). Although converting liquid to gas uses a large amount of heat for no rise in temperature, unless liquid can be kept in contact with the surface (by getting rid of the gas) then heat transfer declines
Making a droplet walk up hill is a neat trick, but in reality its like firing a water rocket with a payload of water.
I hate this kind of story
Ooh wow the Americans made water droplets flow up hill. I wonder how many hundreds of millions of dollars it cost to pull that off?
Here I was, thinking that scientists have found a way to make rivers bring water to parched land where irrigation could help make the land more productive for starving nations,
and all we have are some serious overclockers.
I'd hate to be at a LAN party with these guys.
WARNING: Smartphones have side effects--most of them undocumented.
Incidentally, this news dates from the end of 2005 - so slashdot is running 4/5 months behind the times.
USA! USA! USA!
A bottle of water I poured out on the road very clearly rolled up the hill, a woman with a pram was walking "up" the hill and the pram was rolling without her pushing it.
I shit you not!
2 + 2 = 5
Doesnt stream rise anyways.
Pilfered from their Physical review Letters Paper:
H. Linke,1,2,* B. J. Aleman,1 L. D. Melling,1 M. J. Taormina,1 M. J. Francis,2 C. C. Dow-Hygelund,1 V. Narayanan,3
R. P. Taylor,1 and A. Stout1
PRL 96, 154502 (2006)
To explain our observations, we propose the following
model. As liquid evaporates at the bottom surface of the
droplet, the pressure that levitates the droplet pushes out
the vapor laterally. We propose that the ratchet surface
partially rectifies this vapor flow, which exerts a net viscous
force on the droplet. In the following, we calculate the
magnitude of this force by estimating the pressure gradient
underneath the droplet that drives the vapor flow. It is
important to note that evaporation and vapor flow are
powered by heat from the substrate. The droplets are thus
essentially heat engines.
A droplet placed on a ratchet [see Fig. 3(a)] tends to
curve concavely around the tops of the ridges (point A)
while assuming a convex shape elsewhere. This variation
in droplet curvature can be used to estimate the variation of
the dynamic pressure along the vapor layer as explained in
the following. The local difference between the droplet's
internal pressure pi (assumed constant along the bottom
surface) and the pressure in the vapor film is given approximately
by the Laplace pressure p =R, where R
is the local radius of the curvature (assuming no curvature
parallel to the ratchet ridges) [3]. A concave surface shape
(near point A) corresponds to a curvature RA
pi, while the convex curvature at points B1 and B2 implies
RB > 0 and pB pB. We therefore
expect net vapor flow from point A to points B1 and B2.
Flow from A to B2 is expected to create a viscous force in
forward direction, which we estimate below. In contrast,
vapor flowing from A ''backward'' can escape sideways
along the wide ratchet grooves [into and out of the page in
Fig. 3(a)], because of the small flow resistance in this
direction [18]. Therefore, net forces due to vapor flow
between A and B1 should be relatively small.
The force exerted by the vapor on the liquid between
points A and B2 has two components. First, a forward shear
force due to Poiseuille vapor flow caused by the pressure
differential P pA pB. Using nonslip boundary
conditions and a parallel-plate model.model, the horizontal component
of this force is [19]
F 0:5AeffhjdP=dxj cos; (2)
where Aeff is the total area over which this force contributes
(depending on droplet size, multiple ratchet periods are
involved), h is the thickness of the vapor layer in this area,
and is defined in Fig. 3(b). Second, if the droplet glides
with x relative to the substrate, there is a viscous drag
force given by [19]
x Aeff=hx; (3)
where is the vapor's viscosity.
Also, Leidenfrost effect info:
http://en.wikipedia.org/wiki/Leidenfrost_Effect
l'Homme n'est Rien l'Oeuvre Tout: Gustave Flaubert to George Sand
...I.T. projects I've reviewed as a consultant its scary. The spent huge sums figuring out how to do something which is inherently difficult and provides little real world benefit in anything but the longest possible range projections -- which invariably become useless once that amount of time comes to pass.
Its like building a website out of "Pure J2EE" (whatever the hell that means) -- or building a sand castle one grain of sand at a time. It can be done. That's terrific. But why?
The problem with quotes on the internet, is that nobody bothers to check their veracity. -- Abraham Lincoln
From a little over a month ago on LiveScience.com about this uphill-flowing water. http://www.livescience.com/forcesofnature/060329_w ater_uphill.html
The headline of this article is a bit misleading. Within the article there is no claim of getting anything for nothing...For example I have a device in my basement that makes water run uphill. I have heard some people call it a sump pump. Using a portion of the waste heat from a CPU to drive its own cooling cycle is appealling...but to not have it start to run until local temperatures are already boiling water seems a bit limited.
When the people fear their government, there is tyranny; when the government fears the people, there is liberty.
"Humans are 70%+ water. Most people take the path of least resistance. Some rare people use their humanity to go against the flow." -- Benjamin Bias
Watt wood-eyed dew width aught mine ice bell Czech her?
[100% ISO 646 Compliant]
SVM, ERGO MONSTRO.
Although discredited the military has done some experimentation with the brown note.
When the people fear their government, there is tyranny; when the government fears the people, there is liberty.
However, all the liquid cooling kits I have seen for PCs have been so horribly engineered - and use water, which is basically the wrong stuff when you are trying to cool something to only a couple of degrees over max ambient - that I would hesitate to suggest that something like this could not be developed.
Pining for the fjords
...but you can't make ME run uphill
Now where my beer?
Travelling forward in time at a rate of 1 second per second.
ok. so we screwed physics a little. we've done that billions of times. 1 everything that goes up, must come down..... unless it goes too high. now, how about this. i'll give a million dolars to teh first person to find a way to make niagra falls flow upwards
One step closer to manga/anime being real. If they can have water flow uphill then we can create the entrance to the Grand Line in the manga/anime One Piece! All we need now if for scientists to create "Devil Fruit" that creates supermen when the fruit is consumed and then create the HUGE sea monsters, Sea Kings.
When I grow up I will be a little boy.
Yippy... Now we need some practical applications... Anyone, anyone?
[%] Cingular Ringtones
Why do I get the feeling that this was done just so Journo's could write 'Scientists make water run uphill' as a flashy title on a webpage or in a magazine?
congratulations, by the way...
"Space Exploration is not endless circles in low earth orbit." -Buzz Aldrin
"Flouting" might be a better word to use here.
slashdot.
will never happen.
never.
Simply get the water moving, aim it at an incline, and it will flow uphill. Sheesh.
Now please know that knocking what has been done here. But is it just me or is the title of the article completely wrong? I looked at the video and while the drop is indeed climbing over these "saw" teeth, it isn't going uphill. Now if this was on an incline or really going uphill that would be cool! Of course if anyone has blown on a drip of water on a hard surface, such as a desk, they have essentially created this same affect but obviously without the heat. Watch the video you will see how the drops shape changes from the force behind it. Leave it to the media to completely misrepresent something.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. ~Albert Einstein
Your tax money at work! Sientists can make water go uphill! With this new technology they will do absoultly nothing. But somehow some profit comes out of nowhere. Probolly preformaning street tricks. I too can make water go uphill. 1.Fill a bucket full of water 2.place it at the base of a hill 3.kick the bucket
It's not -1 Flamebait! It's +5 Funny. You just didn't get the joke...
- Plant irrigation.
- micro power generators.
- and of course, heat conduction.
- Possibly moving water in space.
So, you may assume that it is money wasted, but then electricity, the lightbulb, automobiles, computers, and even the airplane were all assumed to not work, a waste of money, or something that god would not allow us to do. And yet...I prefer the "u" in honour as it seems to be missing these days.
Maybe next there should be an article about hot air can make balloons lift off the ground and go up instead of down! Or about how magnets can actually make iron particles rise vertically off of a table top! Or about how a drinking straw can make your lemonade elevate from your glass right into your mouth! The laws of physics are shamefully being flouted!!! Gravity has been a hoax all along!!!
I got more rhymes than Jamaica got Mangoes.
Fluids flowing uphill due to being heated... Used to cool hot computer chips...
What an amazing breakthrough, and not at all vastly inferior to using natural (passive) convection to do the same much faster, simpler, and better.
Slashdot gets worse every day... Pipedot: News for nerds, without the corporate slant
qz
This is very impressive. But, I'm more impressed by the Romans having accomplished this a thousand years ago.
http://en.wikipedia.org/wiki/Aqueduct_(Roman)
Water ignores gravity too!!
A morning without coffee is like something without something else.
Thanks for providing my "something new to learn" for the day; I had to look up SCADA to find out what it was. Full-system monitoring and control; pretty cool idea.
The origin of my horror story is my Thermo prof from the University; his experience goes back far enough that he probably left the industry before SCADA was available (SCADA requires quite a bit of computing power). I'm willing to believe that modern implementations have safeguards against the "melt your exchanger to slag" scenario, in which case you're probably right.
"Space Exploration is not endless circles in low earth orbit." -Buzz Aldrin
If you wanna get technical, it should be "flout", not "flouting" in this context, i.e. "1. Flout the laws of physics".
I realize the point of TFA was to illustrate the potential uses of the technique in coolant movement, but I was struck by this last night. This explains how a pyroclastic flow moves over water (such as in island volcanoes). It's simple! The water superheats, flashboiles, and on top of that steam, flows the magma?
Okay, last night was boring, I admit.
Ana10g off.
just an analog boy living in a digital age.