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Thermophysical properties - multiple equations

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Old   April 22, 2020, 16:08
Default Thermophysical properties - multiple equations
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Tobias Luiz Marchioro Toassi
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Hello foamers,

I need to perform a convective-diffusive transient problem on the chtMultiRegionFoam, with air as fluid and concrete and carbon steel as solids.

As a example, the specific heat of carbon steel is given by:

from 20C to 600C:
Cp = 425 + 7.73e-01*T - 1.69e-03*T + 2.22e-06*T

from 600C to 735C:
Cp = 666 + 13002/(738 - T)

from 735C to 900C:
Cp = 545 + 17820/(T - 731)

from 900C to 1200C:
Cp = 650

Cp is given in J/(kg*K).

The other thermophysical properties of the carbon steel and concrete that I want to simulate are described on this master thesis, and I kindly encourage to see: http://hdl.handle.net/10198/19239, item n. 4.1 (Is written in portuguese).

How do I specify different equations to different temperature ranges in the thermophysicalProperties OpenFOAM file, as the example I give?

Is that any other way to perform it?


Thanks in advance.

Last edited by tobias_toassi; April 22, 2020 at 18:34. Reason: Minor writing corrections.
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