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View Full Version : OT Sorta: New Nozzle Design Yields Smaller Droplets



Tuckerfan
02-15-2005, 08:55 PM
For some reason they're focused on printers and not things like fuel injectors. (http://www.nsf.gov/discoveries/disc_summ.jsp?cntn_id=100652&org=NSF)
<font face="Verdana, Arial" size="2">Using a mathematical optimization procedure they developed, Chen and Brenner reported in the April 23, 2004, Physical Review Letters that tweaking the shape of a circular nozzle will always give you a better nozzle. The best shape they found for making smaller droplets turned out to be a sort of sucked-in triangle. Other factors being equal, the triangular nozzle can cut the droplet size by 21 percent compared to a circular nozzle.</font>Now, allow me to be snarky for a moment, because of this comment:
<font face="Verdana, Arial" size="2">"The idea of using mathematics is a very good one with lots of potential," Brenner said.</font>Really? Who the hell would ever have thought that? http://bbs.homeshopmachinist.net//rolleyes.gif

wierdscience
02-15-2005, 09:44 PM
I already "discovered" that and I don't make near as much money,maybe they are overpaid? http://bbs.homeshopmachinist.net//rolleyes.gif

PSD KEN
02-15-2005, 10:14 PM
No doubt this startling revelation came to him in a blinding flash of light.

Thrud
02-16-2005, 01:35 AM
I think you guys are being hard on the good professor - he does not work in the real world - it is "new" to him... http://bbs.homeshopmachinist.net//biggrin.gif

Intersting discovery tough - the injet printes are now using sub-picoliter droplets and what you may not know is that injet technology is the next step in printed circuit boards and "sprayed on components" such as Organic LED displys. One prime example they are working on is intelligent product labels for groceries (I am not kidding - they are serious about this stuff). Canon recently made a 22 layer flexable circuit board using injet printers - an outstanding acheivment!

Many companies are fighting to get patents for this new printable electronics filed - duPont has over 600 formulae for devices patented already...

It may sound whacky, but 4 years ago some laptop displays cost $8,000 for a replacement screen - most of them are less than $850 (CDN$) now, and this if for the new wide screen units - this is wholsale price - end users pay about 1.5x that plus labour.

So, in 4 - 8 years expect the grocery store to have Campbells soup cans begging your attention with flashy lights on their labels - only good thng I can see is that the older cans will have dead displays as their batteries die off - sort of a "best before" warning...

The part I am looking forward to is sophisticated circuit boards printed at home with no chemical to mess with - it will happen, watch. http://bbs.homeshopmachinist.net//biggrin.gif

[This message has been edited by Thrud (edited 02-16-2005).]

Tuckerfan
02-16-2005, 02:35 AM
Even more cool and "bizarre" is that they're using ink jet cartidges to "print" out skin, and hope to be able to do it with whole organs soon.

darryl
02-16-2005, 02:49 AM
I can see it now- dopants, fine metal and ceramic powders, and phosphors, spraying out transistors, resistors, and a grid of colored led's for that new display screen. Got a problem with your display? Spray out a new one, at 16 per minute. Nanotech coming of age. How about print your own solar cells- or paper thin battery- need another cd? Print one off. It's hard to imagine the leaps that technology could yet take in our lifetimes.

Weston Bye
02-16-2005, 01:41 PM
Thrud wrote:
...expect the grocery store to have Campbells soup cans begging your attention with flashy lights on their labels...

Sort of like the "magic" newspapers in the Harry Potter movies.

The power to imagine...

Wes

wierdscience
02-16-2005, 10:24 PM
Yabutt,I can also see standing inline in the same store with the electronic cashier locked up because it is STILL running windho's and having the Nat'l Equirer tell me all about Hillary Clinton and Michael Jacksons elicit love child http://bbs.homeshopmachinist.net//rolleyes.gifSomebody please give me a talking pack of razorblades so I can slit my wrists http://bbs.homeshopmachinist.net//biggrin.gif http://bbs.homeshopmachinist.net//biggrin.gif

PSD KEN
02-16-2005, 10:35 PM
LOL Weird, but, tis progress, you simply MUST go along.

PSD KEN
02-16-2005, 10:37 PM
<font face="Verdana, Arial" size="2">Originally posted by PSD KEN:
LOL Weird, but, tis progress, you simply MUST go along. (HMM, wonder if Hitlery and Michael really did?)</font>

Amity
02-16-2005, 11:36 PM
Have you guys heard about the Digital Paper? A plastic sheet that can change text instantly, is see thru, and you can roll it up into a tube. The info on it could change from classroom to classroom...They are already talking about motion video (low res of course)

JPR
02-17-2005, 12:17 AM
<font face="Verdana, Arial" size="2">The best shape they found for making smaller droplets turned out to be a sort of sucked-in triangle. Other factors being equal, the triangular nozzle can cut the droplet size by 21 percent compared to a circular nozzle.</font>

I thought they had already discovered that years ago with triangle shape ported ball valves. It was an attempt to get some throttling when opening a ball valve, instead of off then instant on.

Tuckerfan
02-17-2005, 12:19 AM
<font face="Verdana, Arial" size="2">Originally posted by Amity:
Have you guys heard about the Digital Paper? A plastic sheet that can change text instantly, is see thru, and you can roll it up into a tube. The info on it could change from classroom to classroom...They are already talking about motion video (low res of course)</font>
Yeah,the first thing I thought of when I heard about it was the sheet Poole was reading in 2001: A Space Odyssey.