Search found 378 matches
- Thu Aug 12, 2010 7:47 am
- Forum: Flow calculators and fluid flow problems
- Topic: Flow rates in oil pipes
- Replies: 4
- Views: 23439
Re: Flow rates in oil pipes
For laminar flow (Re<2300) flow rate will change with 4 power of diameter Q/Q1 = (D/D1)^4 For turbulent flow where friction factor is not depending on the Reynolds number flow rate will change with 2.5 power of diameter Q/Q1 = (D/D1)^2.5 Anyway, you can try with calculator at: http://www.pipeflowcal...
- Wed Aug 11, 2010 11:03 am
- Forum: Flow calculators and fluid flow problems
- Topic: Gas Flow through VERY small pipe
- Replies: 11
- Views: 15811
Re: Gas Flow through VERY small pipe
Can you draw some image about your injector?
- Wed Aug 11, 2010 7:23 am
- Forum: Flow calculators and fluid flow problems
- Topic: Gas Flow through VERY small pipe
- Replies: 11
- Views: 15811
Re: Gas Flow through VERY small pipe
Some picture will tell more ... Regarding the pipe sizes,... All calculations in "basic" fluid dynamics are based on the assumption that fluid is continuous, which is actually not true, but if the diameter is big enough than you are OK. Big enough means that diameter is bigger than the fre...
- Sun Aug 08, 2010 9:27 am
- Forum: Flow calculators and fluid flow problems
- Topic: Gas Flow In Small Pipe
- Replies: 3
- Views: 5592
Re: Gas Flow In Small Pipe
I still don't have calculator for this kind of problem but you can read theory at: Discharge through valves, fittings and pipes http://www.pipeflowcalculations.com/pipeflowtheory/discharge_through_valves_fittings_and_pipes.htm and for expansion factor Y please find formula for orifices at: Flow thro...
- Fri Aug 06, 2010 9:01 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Gas Flow In Small Pipe
- Replies: 3
- Views: 5592
Re: Gas Flow In Small Pipe
You must tell me the pressure difference from start to finish to calculate flow rate.
I think that 8 bar is on the start, and what do you have on the end - a tank or atmosphere or cylinder?
I think that 8 bar is on the start, and what do you have on the end - a tank or atmosphere or cylinder?
- Fri Aug 06, 2010 7:27 pm
- Forum: Flow calculators and fluid flow problems
- Topic: FLOWRATE CALCULATIONS
- Replies: 1
- Views: 3611
Re: FLOWRATE CALCULATIONS
Here you have simple pressure drop calculator and it can be used to calculate water flow rate as well:
http://www.pipeflowcalculations.com/pre ... /index.htm
http://www.pipeflowcalculations.com/pre ... /index.htm
- Fri Aug 06, 2010 7:25 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Car Exhaust Diameter Flow Question
- Replies: 3
- Views: 11177
Re: Car Exhaust Diameter Flow Question
My opinion is the best solution is to have no car exhaust pipe at all if you want highest power :) Now as this is not a option, than you are trying to get close to it - which is pipe should be as big as possible, but, Flow through car exhaust is by no means stationary - it is oscillating with time v...
- Thu Aug 05, 2010 2:35 pm
- Forum: Flow calculators and fluid flow problems
- Topic: P in pipe that goes up 18' then back down...
- Replies: 4
- Views: 6854
Re: P in pipe that goes up 18' then back down...
Yes, you are right on both...
- Thu Aug 05, 2010 7:46 am
- Forum: Flow calculators and fluid flow problems
- Topic: P in pipe that goes up 18' then back down...
- Replies: 4
- Views: 6854
Re: P in pipe that goes up 18' then back down...
For that height the pressure will be above evaporation point for the normal temperatures (20-30 OC). In order to start the circulation energy (head) on one side must be higher than energy (head) on the other. It can be achieved with pump or with level difference between two tanks. In the second case...
- Thu Aug 05, 2010 7:34 am
- Forum: Flow calculators and fluid flow problems
- Topic: losses thru a valve
- Replies: 3
- Views: 6000
Re: losses thru a valve
This problems in my opinion can be solved only by experiment.
Calculation is maybe possible but with very limited accuracy.
Maybe using numerical methods some better results can be obtained but again, some experiment is also required - that is what I think.
Calculation is maybe possible but with very limited accuracy.
Maybe using numerical methods some better results can be obtained but again, some experiment is also required - that is what I think.