Laminar Jet Construction - Part 2

See Part 1

[@danomcman]

I, too, am impressed with your detailed videos. I have been working on my first laminar flow with very eratic results. Each time I turn back to the net and end up on You Tube; this time I found your tutorials and can see precisely what I've been doing wrong in various aspects of the configuration.

[@MalcolmDyer]

Hello Zach. Thank you for a thorough and competent series of videos on the Laminar flow nozzle. I have been working on one and your videos will help me avoid mistakes. I particularly like the cylinder for evening out pressure variations. I wonder if it would work as well with a four inch pipe?

[@sabs0002]

Great Design. I have followed this and it sure does work however my pool water is not a constant pressure am trying to locate a regulator any ideas?

[@ChristopherOverstreet1]

Thank you for great videos! How long did you cut your straws too? Why did you choose to use much shorter straws than most everyone else's? Does straw length not make much of a difference beyond a certain point?

[@zacharysc100]

Yes,, after sufficient length for the flow to become laminar within the straws near the center of the jet longer straws don't help. I found it to be approx 3" so I believe I cut my straws to 3.5"

[@extremelocura]

great video thanks.

[@danomcman]

I do have one additional thought, perhaps you've already experimented with it so I'll ask you in an effort to save me some aggravation. Is it possible to shape the external flow? All I've ever seen so far are round, cylindrical flows; do you think that if the tube were square as well as the nozzle that the flow (rod) would come out as a square tube?

[@evdeals]

Why not invert the the output valve so sharp edge is last thing water sees?

[@BirdOfParadise777]

Yeah, that's what I wanted to do, shoot a few over the plant beds... for interest. Thanks:)

[@Epsilonwayne]

I have a question, how far can one shoot an arch or a pulse I understand it's probably regulated by water/pump presure, I am looking at designing somthing for a larger pond and maybe shooting the laminar beam up to 15 feet (if doable)

[@Epsilonwayne]

Thanks!

[@BirdOfParadise777]

Well, I don't have a pool and don't want a big pool. I want to use this in my garden. Is it possible, if so how, to run one off of a garden hose or out of a reciptical and into... what? Is there a way to circulate it around to reuse the water? I think that the water must be forced through this Laminar Jet but, at how much pressure and is the pressure through a garden hose enough? Or make a smaller LJ according to the pressure from the hose? I don't have a clue how to figure it all out. lol Help!

[@EngOsamaHaj]

Nice! Is there a place where I can buy a "nozzle-head" that is already made? I had used several brass nozzles, but I couldn't get a nice stream. Also, what type of drill bit do need to buy to make it myself? Thanks!

[@zacharysc100]

www.homedepot.com/p/Vermont-American-1-2-in-High-Speed-Steel-Countersink-Bit-16634/204300472

[@zacharysc100]

There is no economic regulator that will fix your problem. What you need is a big bladder tank. Or just a large ballast tank with air inside. A hot water tank works great.

[@leepu747]

Dear Sir I also tried for laminar, up to a extend I successes, but after a distance water spread. I use 4" dia pipe and 10" long and water jet hole is 12mm. pump is 18 meter head and discharge 6480 lph. I need water flow rate and pump specification

[@zacharysc100]

I tried several 4" diameter versions, None worked at the exit velocity I needed to get decent arches of laminar streams. This is a laminar flow versus velocity problem, you have to go to 6" PVC.

[@leepu747]

@@zacharysc100 thanks for reply Sir. Will update you soon

[@leepu747]

@@zacharysc100 you mean, increase the pipe dia, low pressure will developed? Or any additional device for low pressure?

[@zacharysc100]

Yes you need to increase the jet body diameter. 4" will work if you want to keep the flow rate pretty low, you can also use a 3/8" nozzle on the 4" jet and get decent results, but if you want the bigger stream and higher arcs you need to go 6" on the body.

[@leepu747]

@@zacharysc100 hay bro you are carpenter!!!!! I am also

[@mohammednaje5055]

cool ! i have a Q , what kind of material U used to make the nozzle ?

[@zacharysc100]

Aluminum, you can just use a whole saw to cut an aluminum disk,, then glue/epoxy it into the top plate once you've created the knife like profile in the middle.

[@Gowidafloman]

why a tangential inlet though?

[@zacharysc100]

It keeps the turbulence of the input from reaching the output by forcing it to rotate and settle in the first section of the jet.

[@jdn3744]

Here's the patent for Disney's laminar flow jet used at Epcot... google.com/patents/US5115973

[@zacharysc100]

Yes, I looked at this and a few others when I was building these 👍