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Author Topic: Flash simulation  (Read 34 times)

IliasBouchkira

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  • Posts: 29
Flash simulation
« on: May 15, 2023, 09:20:21 PM »
Hi everyone

Is there any examples in the forum on how to carry out a Flash calculation (vapor liquid equilibrium)? The purpose is to determine phases compositions and if possible partial pressures..

Many thanks in advance

Ilias
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dlparkhurst

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  • Posts: 2917
Re: Flash simulation
« Reply #1 on: May 15, 2023, 10:00:13 PM »
I'm not sure whether you want to heat of cool your solution. Here is an example of water in equilibrium with halite that is heated to 150 C (in the absence of halite solid). The solution is in contact with a 1 liter gas head space. The resulting system has a pressure of 3.6 atm due to H2O(g) in the head space, and the solution is undersaturated with halite, so no halite precipitates.

Code: [Select]
SOLUTION
EQUILIBRIUM_PHASES 1
Halite 0 10
SAVE solution 1
END
USE solution 1
EQUILIBRIUM_PHASES 1
Halite 0 0
REACTION_TEMPERATURE
150
GAS_PHASE
-fixed_volume
-volume 1
H2O(g) 0
END
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