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Injection of 2 gases at different temperature in a pipe

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Old   June 21, 2023, 05:12
Question Injection of 2 gases at different temperature in a pipe
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imad zgheib
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Hello everyone, I trying to find the most suitable solver to run a simulation of 2 gases at different temperatures inside one pipe (one flow of gas A at a high temp, and a sheath flow of gas B at room temp), and see the effect of the temperature on the flow itself becuase of the density differences resulting from the temperature differences. I don't want to simply see how the temperature is changing.
the ultimate goal is to minimize the wall contacts of gas A.
I have basic knowledge in Openfoam, ive only used simplefoam before.
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Old   June 21, 2023, 05:15
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Quote:
Originally Posted by imadzg View Post
Hello everyone, I trying to find the most suitable solver to run a simulation of 2 gases at different temperatures inside one pipe (one flow of gas A at a high temp, and a sheath flow of gas B at room temp), and see the effect of the temperature on the flow itself becuase of the density differences resulting from the temperature differences. I don't want to simply see how the temperature is changing.
the ultimate goal is to minimize the wall contacts of gas A.
I have basic knowledge in Openfoam, ive only used simplefoam before.

you can find attached a simple image to explain how my case is
Attached Images
File Type: jpg sheath.jpg (26.7 KB, 8 views)
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Old   June 23, 2023, 07:50
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Tom Fahner
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Hi,

Based on your description I guess gas A and gas B have different species as well? In that case I guess you would need to run something with rhoReactingBuoyantFoam to have all physics involved modeled correctly.

Otherwise if it is just a single species but at different temperatures, buoyantSimpleFoam or buoyantPimpleFoam can be used.

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Tom
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Old   June 25, 2023, 17:05
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Charles
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You can consider using solver reactingFoam with reaction feature turned off. This allow different species and temperature inlet boundary conditions.
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gas, mixture, openfoam, solver, temperature

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