|
[Sponsors] |
September 5, 2015, 04:49 |
Gas tank discharging
|
#1 |
New Member
Join Date: Sep 2015
Posts: 2
Rep Power: 0 |
I think the gas tank discharging were highly studied. But I am still confused when I count the number of equations and the number of unknowns.
Problem: Having known pressure and temperature of gas into the tank find their variation versus time if the tank discharges in atmosphere through a small hole. Equations: 1. Mass conservation (continuity equation) 2. Momentum conservation( Euler or Bernoulli equation) 3. Energy conservation 4. Gas state equation Unknowns: 3 parameters inside the tank: pressure temperature and density 3 parameters at the hole; velocity, temperature and density Note: 1. the pressure at hole is assumed to be equal with atmospheric pressure 2. The state equation is counted twice; inside the tank and at the hole Conclusion; 5 equation and 6 unknowns Could you tell me what I am misiing? |
|
July 12, 2016, 13:32 |
Equation for the discharge from the orifice
|
#2 |
New Member
Maryam
Join Date: Dec 2015
Posts: 13
Rep Power: 10 |
I think you are missing the equation which correlates the orifice (hole) discharge rate to the tank pressure.
|
|
Tags |
compressible flow, discharge coefficient, discharging, one dimensional flow |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Setting the height of the stream in the free channel | kevinmccartin | CFX | 12 | October 13, 2022 21:43 |
mass flow in is not equal to mass flow out | saii | CFX | 12 | March 19, 2018 05:21 |
Need Help! High pressure Gas discharge from tank to tank through a pipe | superarthur86 | FLUENT | 2 | June 16, 2017 10:22 |
error message | cuteapathy | CFX | 14 | March 20, 2012 06:45 |
Gas pressure question | Dan Moskal | Main CFD Forum | 0 | October 24, 2002 22:02 |