Mechanically-Created Frictionless Surface 27
EoRaptor writes "How to enhance the properties of already low friction surfaces down to zero friction. Even water won't stick. I found this link over on Ars Technica. First, I'll build a black ship with black controls that light up black..."
Re:on airplanes? I think there's a problem (Score:1)
As for the turbulent boundary, I seem to remember that this effect is independent of the friction against the surface, and that the best way to combat this would be managing the microstructure of the surface; making it bumby (in a controlled way), rather than getting it as smooth as possible. Now, IANAE, so please take this with a sack or two of salt.
Re:on airplanes? I think there's a problem (Score:1)
/Janne
Re:Infinite power! (Score:1)
Re:Disposal? (Score:1)
Re:Frictionless Substances and the Artificial Hear (Score:1)
Re:Frictionless Substances and the Artificial Hear (Score:1)
Re:Disposal? (Score:1)
Does this mean... (Score:1)
We could have slides that would accelerate toddlers to near mach speeds?
If they could make this transparent, that I wouldn't have to scrape my windshield?
If I had furniture made out of this stuff, that I wouldn't have to ever dust again?
Re:on airplanes? I think there's a problem (Score:1)
As for stability, drag is only required when the craft is not pointing straight ahead. The idea is that as the craft drifts from a proper orientation, the back end begins to experience more drag than the front, pulling the craft back to where it belongs. The drag at the back is produced not by friction, but by a surface (rudder, elevators) which is not oriented parallel to the airflow. So covering the whole thing with super-teflon will not produce any big problems.
Re:The entire story seems to be summed up as: (Score:1)
HASH(0x1511df4)
HASH(0x11f5624)
HASH(0x1311844)
Cool! (Score:1)
Now I can get that set of frictionless bedsheets I always wanted!
Re:Infinite power! (Score:1)
on airplanes? I think there's a problem (Score:1)
IANAAE (I am not an aeronautical engineer) but...
Lift is produced by differential in pressure between the upper and lower surfaces of the wing - it's shaped so that air meets more resistance on the underside of the wing than on the top of the wing. This means the air flows faster over the top, creating lower pressure there. Higher pressure underneath than above means the wing rises and takes whatever's attached up with it. That's Bernoulli's Principle (I think), and we all probably remember it from high-school science classes.
BUT - that relies on resistance (friction). If you have a frictionless wing surface, then logically won't you lose the pressure differential that generates lift? And by consequence, won't you be stuck with an ice-proof plane that CAN'T FLY?
Like I said, I'm not an engineer, but this seems to be a problem...
Re:Does this mean... (Score:1)
Yeah, but you'd have to really watch your posture. Slouching could lead to the accelerating toddler effect...
OK,
- B
--
good for games (Score:1)
Never Scrub a Toilet Again (Score:1)
To the Moon!
http://www.beefjerky.com
Yeah (Score:1)
condom question (Score:1)
Re:Infinite power! (Score:2)
Can a gecko walk on it? (Score:2)
-russ
Could the process be applied to chips? (Score:2)
(stretching a substrate, adding a coating
and then allowing the substrate to contract) be
used to create cheaper / smaller / faster chips?
"The only reason for time is so that everything doesn't happen at once." - Buckaroo Banzai
Infinite power! (Score:2)
Anti Grafiti (Score:2)
Disposal? (Score:2)
Errrrrgh... (Score:2)
"Titanic was 3hr and 17min long. They could have lost 3hr and 17min from that."
All hands - brace for societal impact (Score:3)
Yes, I know it probably isn't magic, but think of all the things where friction is a limiting factor. Even if this type of coating only HALVES the friction force, the impact would be incredible. If it really is as non-reactive as they are saying, a whole new class of containers and transmission conduits would spring into being.
What's more, this sounds like a relatively straight-forward manufacturing process and could probably be incorporated into almost anything where one part rubs on another or needs to be protected from the elements.
I want more specs! How hard is this stuff, could it function as a cheap substitute for industrial diamond coatings? Is this stuff a conductor or insulator (either? semi?) At those densities, how does it bleed heat?
Bond a coating of this stuff to ship hulls and watch those barnacles try and get a grip! That alone would revolutionize the costs of sea transport. Not to mention the reduction in friction effects for the hull itself. Anything that has to resist the effects of sea water would be transformed.
Near frictionless bearings without magnetics or lubrication, now THAT would be cool...
Frictionless Substances and the Artificial Heart (Score:4)
Barney Clark, the first artificial heart recipient, died of a stroke due to clotting in the device that eventually traveled to his brain. The new 'heart assist' pumps that are in use now that aid patients until their heart heals from an injury or disease, or until they can find a donor heart are made with certain ceramic materials that are so irregular that blood clots on them more rapidly than on smooth polymers and metals that were used in earlier devices.
The theory behind these is that because the surface is so rough, the blood clots that do form are much less likely to break off and work their way into a critical artery blockage. It seems to work, but these devices are *Very* high maintenance and require tubes and/or wires to extend from the chest cavity to power them.
This new material could have a profound effect on artificial organ research because, like the smooth muscle of the heart, blood won't clot on this stuff. If the research proves out, artificial heart devices can be made smaller, more powerful and less intrusive.
I just hope these guys realize this and will provide samples to research hospitals...