## Search found 373 matches

- Wed Jun 11, 2014 10:37 pm
- Forum: Flow calculators and fluid flow problems
- Topic: How to calculate vertical pipe flow
- Replies:
**1** - Views:
**5702**

### Re: How to calculate vertical pipe flow

You can use height difference as available head in calculator, ie p1 = rho * g * h + 101325 Pa, p2 = 101325 Pa.

- Sat May 03, 2014 12:41 am
- Forum: Flow calculators and fluid flow problems
- Topic: Roughness...
- Replies:
**2** - Views:
**7953**

### Re: Roughness...

Roghness really depends on the level of surface treatment for new pipes and corrosion level for old ones. It can be anything up to 1 mm depending on the pipe itself.

- Wed Apr 30, 2014 10:57 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Calculating Pressure Vs. Time While Filling Tank
- Replies:
**2** - Views:
**22902**

### Re: Calculating Pressure Vs. Time While Filling Tank

You can look at post here: http://forum.pipeflowcalculations.com/viewtopic.php?f=3&t=10 This is similar problem as yours, but not exactly the same. Your equation is I think correct but have to clarify some abbrevations used: Vt - is volume of tank MWair what is for? rho * V * A = G = dm/dt is mass f...

- Tue Apr 29, 2014 11:24 pm
- Forum: Flow calculators and fluid flow problems
- Topic: question about pipe flow
- Replies:
**1** - Views:
**5556**

### Re: question about pipe flow

You can't calculate flow rate with data you provided. You have to know more. Regulator should keep outflow pressure at constant value regardless of inlet pressure and flow rate, so for any flow rate pressure should be at set point, if flow is within regulator capacity. If your question is how much g...

- Wed Apr 23, 2014 10:12 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Reducing pressures with Orifice Plates
- Replies:
**5** - Views:
**9130**

### Re: Reducing pressures with Orifice Plates

Calculator gives option for enter either density or temperature. If you choose to enter density, than calculator using R is calculating T prior to other calculation is done. I can't tell you about pipe roghness you should use. I think that it is the best way to be on safe side and choose values of p...

- Mon Apr 21, 2014 8:39 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Reducing pressures with Orifice Plates
- Replies:
**5** - Views:
**9130**

### Re: Reducing pressures with Orifice Plates

Kappa is for expansion factor ISO 5167 - Y for orifices, you have it in the right middle of this page: http://www.pipeflowcalculations.com/pipe-valve-fitting-flow/flow-in-valves-fittings.php R is simply used for calculations between rho, T and p in ideal gas state equation, depending on user inputs....

- Sun Apr 20, 2014 12:25 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Calculating Air Flow on exit of pipe where inlet is orifice.
- Replies:
**1** - Views:
**5548**

### Re: Calculating Air Flow on exit of pipe where inlet is orif

I think that with orifice calculator you can calculate it easily.

http://www.pipeflowcalculations.com/orifice/

http://www.pipeflowcalculations.com/orifice/

- Fri Apr 18, 2014 11:03 pm
- Forum: Flow calculators and fluid flow problems
- Topic: Reducing pressures with Orifice Plates
- Replies:
**5** - Views:
**9130**

### Re: Reducing pressures with Orifice Plates

Hello, Gas constant for CO2 is R=189 J/kgK and k=kappa=Cp/Cv=1.3 for CO2. These values are needed for calculation. You have table at: http://www.pipeflowcalculations.com/tables/gas.php . I suggest you to use check button with "use ISO constraint" just to be sure if calculation is within its purpose ...

- Sat Apr 12, 2014 2:40 pm
- Forum: Flow calculators and fluid flow problems
- Topic: New calculator – fuel combustion heat energy calculator
- Replies:
**0** - Views:
**14907**

### New calculator – fuel combustion heat energy calculator

Fuel combustion heat energy calculator is developed for calculaton of heat energy (heat power) that is released during combustion of specied fuel for known fuel flow rate. Calculator is also suitable for inverse calculation of fuel flow rate for known heat power. Try calculator at: http://www.pipefl...

- Sat Apr 05, 2014 12:23 am
- Forum: Flow calculators and fluid flow problems
- Topic: Java version problems - plans to upgrade this website?
- Replies:
**1** - Views:
**5197**

### Re: Java version problems - plans to upgrade this website?

As older Java is used that means that with new Java version you can run calculators, with no problems. But for security reasons you are requested to update java to version 51 which is 1.7, at least. Update of this site is undergoing and calculators one by one will be redesigned to new technology and...