in fact I want to know how can we find the function between total pressure and boiling temperature for the two phase flow trapped in an insulated vessel which is exposed to constant heat flux?
the only law I know is modified Rault's law(Gamma/Phi formulation of VLE) , in it the parameters xi (composition of liquid) and yi(composition of vapor) and other parameters constantly change during the rising temperature.
how can I find the relation between compositions and temperature in order to make the equation in 2 parameter P total and T boil?
it's noticeable that we have real gas and real liquid and simplifying assumption there is equilibrium between two phase during rising temprature and both phases are not binary
I will appreciate if someone explain this
1- Do CFD simulation for your problem (I think transient analysis will be useful in your case.
2- Specify location(s) to find the value(s) of total pressure and temperature at this or these locations during the different times steps.
3- Try to use regression analysis to find the relation between the total pressure and the boiling temperature from the previously obtained CFD results.
thanks Mr. Yasser Ahmed for your guidance
in fact I want to find the relation between pressure and temperature to do a good CFD simulation not to do CFD simulation to find the relation,
I m going to do a CFD simulation, but in a part of it, Fluent asks me to set the boiling temperature , in this case, boiling temperature is the function of total pressure which change both of them , so it asks me to enter polynominal equation for boiling temperature, I don't know what these polynominal coefficients are?
I think you need to go through the code manual, which may provide some values or a range for the coefficients. In addition, try from literature to find some simple or even rough values for your coefficients to start your simulations. Take care because sometimes the needed values can 't be obtained unless you conduct some experiments for this purpose.
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