Build a laminar flow nozzle for $15

[Scroupsta]

Duck tape!!!

[4444mongo]

I pee like this

[gryphern]

@4444mongo The you, friend, ought to take your urethra out on the talk show circuit.

[jmbeventphotography]

I think she likes duct tape!

[Mr3wheeledbike]

cool but what kind of protect dose it go to.

[wintersnowolves]

Is it possible to have a laminar flow follow a tube? just its coming up to halloween and I was thinking if you could make this portable the ghostbusters energy beam things would be perfect for this

[Nanovirus5995]

7:56 HA He looks Soo bored!

[WyldeSoul]

Er... don't know what she thinks, but 2 1/4 inch holes only has half the flow capacity of the single 1/2 inch diameter hole.

.098 square inches total area for the two 1/4 inch holes vs .196 square inches for the one 1/2 inch hole.

[gryphern]

@WyldeSoul 1:43 "In this example the 2 1/4 inch holes offer half the area of the 1/2 inch hole..." "If you use the same water pressure for the 1/2 inch hole that you use for the pair of 1/4 inch holes you'll probably blow the pair of 1/4 inch holes right off the front of your nozzle!" Not everyone learns through audio. You may want to review the written transcript in the more info box for a clearer way to access the information.

[leodadeath]

thx I build one for just 4 euro :D

[DanishM1Garand]

This is so cool. With salt water it can be used for antenna. Now i need to find out how to make a magnetic coupler for the antenna.

[gryphern]

@DanishM1Garand @DanishM1Garand See, the only problem I can think of with that is the supersaturated salt water (brine) would kill your water pump. But it would be so easy to change the length of the antenna by changing angle and water pressure. If you can find a ham radio list serve ask around for ILA designs, you can make them for pretty cheap. David Hatch (N9ZRT) has done a bunch on this topic. Google "Ionic-Liquid-Antenna-a-Viable­-Antenna-for-Amateur-Radio" for a schematic.

[Winsucker]

Looool-was that blood on the wood :D?

[SuperUnic0rn]

DUCT TAPE!!!!

[Sillyzombie666]

you just got this video posted on hack aday

[gryphern]

@Sillyzombie666 Thanks for the heads up. Anyone who's interested should click on the link to the laminar flow forum in our video's info section, liteglow, another YouTube member has put together resources on cut offs, and electronics.

[scafativ]

Might you have been better off cutting off the bending parts of the straws?

Great video.

[gryphern]

@scafativ Yeah, the bendy parts add turbulence. we used them for the video because they are the most common straws to find in grocery stores. For nicer fountains we go to restaurant supply stores and buy dainty extra long straight straws that are served with mixed drinks. They are phenomenal. A really cool guy at Washington State University told us he just stuff mesh into his tubes, because there is directional flow all the water is forced to become laminar.

[macgyver2210]

Cool demo, but that woman's voice is like nails on a chalkboard.

[gryphern]

@macgyver2210  SCREEEEEEEEEEEEEEEEEEEEEEEEEEE­EEEEEEEEE

[jaquan123ism]

Epic Duct tape

[gryphern]

@jaquan123ism @jaquan123ism Once, in a land without hope star metal fell from the sky. The young peasant tape was working the Potash fields when he was struck by the shining quicksilver. Whether he was ready to be a hero or not, his destiny was set in the stones of fate. He would bear the mantel and save the Kingdom. He was...

EPIC DUCT TAPE.

[xMelissouillex]

Hello,

is it possible to make a turbulent flow or is it only done in research centre ?

thanx :)

[gryphern]

@xMelissouillex Turbulent flows are easy, an uneven nozzle, rough pipe, anything that will set water into chaos.

[khanrhy]

Hmmmmm, I wonder if you could use laminar flows + water jet technology for attack submarines to make them more stealthy.

[BalthezarArith]

woah, dude's left-handed! nice.

[777bry777]

I have a question for you - would this method work (or could it be modified) to produce a column of air? I'd like to build a sort of "smoke wall" in the garden and traditional smoke machines diffuse too quickly... But I'm not motivated to do so until it starts warming up outside, so for it's more of a thought experiment at the moment.

[gryphern]

Well, since air is super thin you can play with it differently. It would be easier to make a planer laminar jet with air than water, think like a water broom if you've ever used one. You can also use round nozzles, check out Silvent company's site to see their high pressure laminar air nozzles. You'd be working with low pressure though, and many of the problems high powered industry tools have you'd be immune to. My suggestion would be to create a trough out of a (...continued)

[777bry777]

@gryphern

Thanks! This does work pretty well in a small test rig. I'll be sure to post a vid of the final product when it's all done and be sure to credit you!

[gryphern]

... a wide diameter PVC pipe, and place ultrasonic fogger strips inside. Ultrasonic foggers vibrate a membrane using electricity and force water into tiny fog droplets. You can get several membranes in a row on some models, or buy single membrane foggers. If you can make a good model of a planer nozzle along the length of the pipe the increased pressure generated by the foggers would force a little (it's a really low pressure differential) fog out the slit-nozzle and create your fog wall.

[gryphern]

...So finally, you'd hang the pipe up high, and the the fog would come out in a smooth, planar, sheet and gravity would move the flow down? (Hmm I think I spelled planar with an 'e' earlier!)

[raunchbear]

Wow, technology in the South sure has gone places

[gryphern]

I strongly suggest looking into Georgia Tech's bioinfomratics program.

[erikev]

They really have *no* clue. It is actually easy to get a laminar flow, but this big box with duct tape and straws fails.

[VALKIR4636]

duct tape! *quack* lol

[liteglow2000]

Thanx for sharing the URL to the forum on your videa ;)

Just remember, it was THIS video that was the beginning of everything :-) including starting the forum..

Thanx

And Cheers :-) :-)

[lilzbit]

Does anyone know, or got the video on how can we make the water coloured? (using led / fibre optics or any methods)? thx.

[gryphern]

Yeah, you can add a fiber optic line into the stream, these kits are sold for backyard pool fountains. You can also shine light into the stream and have a scattering agent in the water s the stream glitters and glows with color. Ask the question on the laminar forum in the description its all the youtube laminar enthusiasts having a discussion.

[qwertypenis]

Hahaha, "for testing purposes, DUCT TAPE"

Love it!

[liteglow2000]

Hi and THANX for a great video :D :D

I just wonder why you must have the green\red pads in the bottom ??

:)

I did try to build a small version of this using 40-50 straws but not any good result :\

anyway.. THANX again :D

[gryphern]

We tried a small one, too, and yeah it sucks. You need to have a nice wide chamber to slow the water down and let it all flow in the same direction.

The pads at the bottom breaks up any "direction" the water has to its flow and slow it down so that inside the rest f the chamber there's no eddies or major turbulence. You can actually produce a laminar nozzle that just has crumpled screen door mesh or pads in it, youtube user wbeaty who works at Washington University made one using screen mesh.

[DJPish]

The theory during 0:47 is very wrong. This is only true in a closed system.

[gryphern]

I'd appreciate feedback on that--we based it off of two of our old college physics textbooks, but textbooks aren't always accurate.

[DJPish]

If you have a 1m wide river with a flow of 3.4 m/s and you cut it of to a width of only 1cm, you get a river with the same flow as the spd of sound. I bet you can see the wierdness in that.

However, if you do it, as with the flow nozzle, in a closed system, the theory works. This is easy to verify with Bernoullis principle. If the width of the pipe is made smaller the pressure increases and, to compensate that, the dynamic pressure must increase, which means increased flow. I suppose..

[asheronscall1234]

Err no. Smaller witdth means higher flowrate and hence lower pressure, from bernoulli. Easy to see in a Venturi tube. But you don't need that for the theory of 0:47

Open rivers are not really relevant to your case. All that you have to use is conservation of mass. All the water that comes in in the wide part, has to come out on the smaller part. That means that it has to come out a lot faster on the small end. (regarding water as incompressible).

To conclude: really cool video!

[yeffrey1]

This is deeply nifty!

I had a couple of questions:

1) How do you mount the lasers to do that nifty coloured light thing?

2) How do you make it shoot little curving bullets of water instead of a constant stream? Could you perhaps keep the flow moving but have a rotating disc with holes so it blocks the flow sometimes and lets jumping water through?

3) Do you think it's possible to produce the pressure necessary with a consumer-grade fountain pump resulting in a closed system?

Thanks for posting!

[gryphern]

To make light appear to jump along the laminar jet mount a $1.49 pet toy laser pointing into the flow at either end, the laser needs to hit the inside of the flow at a 48 degree angle. Because the water is laminar you can only see the light from a few angles unless you add something to scatter the light.

Brush something fuzzy, like the top of some grass that has gone to seed along the edge of the flow near the outlet. Where the grass introduces bubble and turbulence the flow lights up.

[gryphern]

There are different ways to cut off the flow. We tried the disk idea and it works, but you have to have a splash guard of some kind, or install the whole unit in a box/buried to hide maximize the effect. You'll need a power source of some kind to power the disc, powering the disc spinning using the water pressure from your source doesn't work, since the jet, when cut off and splashing onto the disc, adds friction and stops the disk.

[gryphern]

You need a pump that can put out a constant flow with the gallons per minute you need, "GPM." Compare the fountain you're making with commercial set ups, they have installation manuals on the web and you can glean useful knowledge from them. On the date of this post inyopools * com has the specs and installation for Jandy brand laminar heads posted, included suggested minimum flow rates.

[yeffrey1]

Cool! Thanks for the reply.

Built my laminar nozzle last night, just need to glue it together as it's in beta stage right now. I'm going to pick up a surplus motor and make a disk to create water jets. I'm planning to use old whiskey barrels, the kind they use for planters, with dark mesh over the top and a plexiglass splash guard. Hopefully I can find a decent, inexpensive pump so I can have jumping water in my garden! Thanks for the great video and the helpful response!

[chromebeats]

Uuh this is a copyrighted method, you know that right? I guess you have seen the video on discovery too about the Las Vegas, Mirage fountains.

[gryphern]

No! There are ~patents~ on many many variations of laminar flow nozzles! Copyright also protect intellectual property, but differently! Right idea, wrong application! Patents are publicly available documents you can read, talk about, and share! But rather than referencing a patent, I used university thesis this is a simplified version of, its year of publishing and its authors, so people could look up the source.

[gryphern]

There's a lot of folks, particularly young folks, whom the record and movie industry have scared crapless about intellectual property rights, and well-meaning but uninformed authority figures have taught that they can't touch to the point where they don't know if they can quote a song in a poem. What made you immediately respond that it was copyrighted? Did you think the video was somehow illegal? This could be a good excuse to learn about intellectual property laws in the US and abroad.

[metacorder]

It seems to me that this video spends far too much time explaining how to build the device, which any moron could figure out in 30 seconds. For instance, do I need someone to show me how to remove a cap from PVC pipe? Answer: I think not. Besides, the real question is why the hell would I want to build something like this anyways? Maybe if more of the 8 minutes were spent showing me what "cool" things this device can be used for I might actually want to build it.

[gryphern]

AH! A Challenge! To prove you are not a moron within 30 seconds of reading my reply figure out how to build a device of similar complexity in the world of optics instead of fluid dynamics! Describe how you would make a beam of laser light jump along a curved path like tracing the route of a moving bunny rabbit, the device cannot have moving parts of any kind, just as this flow nozzle doesn't--GO!!! And if you give me the pat answer from optics demonstrations I'll know you cheated!

[metacorder]

I'd guess fiber optics, but mainly my point is just that you should probably have your instruction videos begin with all the cool stuff you can do with the device (so I can decided whether to invest the time in watching the whole thing), then give a brief overview of how it is made. Much of the video is a bit heavy on the details unless you think people are really that stupid.

[metacorder]

(don't worry I get it)

[gryphern]

Most of the people who have written to us are smart, and already know what a laminar fountain is and just wanna build one--but not all speak English as a first language, or can hear (hence the transcript.) It's about making the video as accessible as possible: Slow and stupid but nothing left to guesswork. There's a bunch of cool laminar videos--the related videos tab shows that stuff right next to our video.

*You make laser light jump like a bunny by dissolving sugar cubes in a tank of water.

[SilentTecro]

Now that's a slick nozzle! It would work well on a homemade water gun, assuming it works well at higher pressures. We've used mesh to some extent but it looks like you have the technique down pat. Thanks!

[metrictensor3]

This video was absolutely great. Perfect!!!

[gryphern]

Thanks! Good luck on your fountain, we tried our design in a smaller pipe, but the laminar stream began to decay only a few feet out of the nozzle. I think because of cutting out some steps and using the cheapest materials we could find we're forced to work large.