pressure and flow in fluid a branch?

[brashear]

Hi,
I have a pipe that divides into more than one non-identical branch. I am interested in solving the pressure and flow rate inside each of the branch. Thanks

 

[brashear]

forgot to add: incompressible flow.

 

[katmar]

brashear - this has been discussed here many times - try the search function under the "Forums" tab on the top right of the page.

Katmar Software - Engineering & Risk Analysis Software

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"An undefined problem has an infinite number of solutions"

 

[vpl]

Go find a Crane's Flow of Fluids -- or buy one, they're not that expensive.

Do a flow diagram showing what size pipes, what fittings, valves, etc.

Remember that for reasonably incompressible flow what goes in at the start needs to come out somewhere.

Patricia Lougheed

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[MortenA]

at branch and converging points all pressures are equal. Use this for solving the flow equastions

Best regards

Morten

 

[brashear]

Ok, I think I figured it out. I've written up everything clearly for you guys - can you see if it makes sense? Thanks

http://i.imgur.com/eoTlQ.png

 

[brashear]

where C is the orifice flow coefficient

 

[brashear]

also should be divided by 2 not multiplied...

 

[MortenA]

I wouldnt ignore elevation (unless its a closed system).

Best regards

Morten

 

[BigInch]

I don't think it would be pipe safe to ignore elevation in a closed system. Elevation increases pipe pressures .. even (or especially) when there is no flow.

Let your acquaintances be many, but your advisors one in a thousand’ ... Book of Ecclesiasticus

 

[simplemath2]

is this something college class homework?

 

[brashear]

no, I'm trying to model something. Yes, I can ignore elevation, because the whole thing is only a few millimeters tall.