My First Laminar Flow Device

This is my first attempt to make a laminar flow device. Its 4 inch pvc with a cap and a hose adapter, then scotch brite pads, and a 100 or so normal straws to organize the flow, and then a funnel to get it all out. The next step is to use different straws for a better flow.

Category:

Science & Technology

Tags:

• laminar
• flow
• do it yourself
• project
• water
• hose
• backyard

[jaydenlawson]

Did you end up optimising it for a better flow?

[FonrusNoma]

@jaydenlawson Yes, there is a system that works much better. A larger pipe and more straws is most helpful. If you can find a 16" or so piece of 8" diameter pvc you get a much better result. Also the funnel is not the best for laminar flow, but a straight cap and something to cut the water into shape. Many many things can be done (and have been done) to make it better.

[jaydenlawson]

@FonrusNoma Sweet - thanks!

[BirdOfParadise777]

Just wondering... What is this for? Why are you making this? What are you trying to achieve? What is it used for? What does "laminar" mean? Thanks:)

BOP

[askjacob]

You are probably nearly there. One thing though, and it seems to catch a lot of people out - is you need a very SHARP transition to your jet - using a funnel (especially with a long tip) to transition the flow will re-introduce all the turbulence you are trying to remove. As strange as it sounds, a perfectly flat plate with a knife-sharp edged hole (with no taper to it from the water side - the taper should be on the outlet side) will do the job very well. Try that!