How to mix gases with different properties in Simulink ?

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Guillaume
Guillaume 2022-6-22
回答： Pramil 2024-8-22
Hello everyone,
I work on a project where I have to use three different gases for mix them :
I use simulink for obtain the density of the gas mixed but I have this error message :
"Error compiling Simscape network for model labo.
Caused by: ['labo/Gas Properties (G)1', 'labo/Gas Properties (G)']: Failed to propagate domain parameters. Domain parameters are propagated to the same set of nodes from sources: 'Subsystem10.Gas_Properties_G1.A' and 'Subsystem10.Gas_Properties_G.A'. Each node may only have at most one source of propagation."
So, how can I mix different gases if I can't define a physical constant for each of them ?
As a reminder, I don't know gas properties for the mixed gas.
Thanks for your help
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Guillaume
Guillaume 2022-6-29
but except this simulation, the knowledge of this properties is useless for me and I lose so many precision by calculing gas properties

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回答（1 个）

Pramil
Pramil 2024-8-22
Hey Guillaume,
Connecting three gases won’t mix them, rather it is perceived by Simscape as specifying the domain parameters more than once, as suggested by the error you received.
To obtain a mixture of gases in Simscape, you can use the “Moist Air Properties” block instead this block specifies data for “dry air”, “water vapor”, and “carbon dioxide”. However, you can replace them with your own gas properties so you will essentially have a mixture of up to three gases.
Here is the link to the documentation of “Moist Air properties” block for your reference:
https://www.mathworks.com/help/simscape/ref/moistairpropertiesma.html

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