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#1 |
New Member
mike
Join Date: Feb 2019
Posts: 2
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Hi,
I am looking to simulate CO2 flow. I am using CFX. I have found academic papers describing simulations with CO2 but I am unsure how to import CO2 to make it an available fluid to select. I am using workbench 17.1. I was hoping someone could help me out. Thanks |
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#2 |
Senior Member
Erik
Join Date: Feb 2011
Location: Earth (Land portion)
Posts: 1,173
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There are so many options I don't know where to begin. It depends on what type of simulation you will be running, and at what conditions. You don't just, "Import CO2".
You have to decide if constant properties and incompressible are suitable, or if ideal gas is more appropriate, with or without temperature dependent properties. Or do you need real gas equation of state, or an RGP file with liquid and gas properties. |
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#3 | |
New Member
mike
Join Date: Feb 2019
Posts: 2
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Quote:
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#4 |
Senior Member
Erik
Join Date: Feb 2011
Location: Earth (Land portion)
Posts: 1,173
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If it is supercritical, don't use liquid properties. Import that and take a look at what the properties are, they are constant properties.
The gas phase combustion "CO2" is a gas and would be more appropriate, but still this is not a perfect material model. It is ideal gas, variable specific heat, and uses constant viscosity and thermal conductivity which may or may not be applicable to your simulation conditions. I would suggest you learn about the different methods for defining material properties, and define the material yourself. A Program such as RefProp can be used to determine what the material properties are at different temperature and pressures. Then you can decide if you need to make viscosity or some other property a function of temperature/pressure, and how you should define you material for your specific conditions. |
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Tags |
co2, import fluid, supercritical flow |
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