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How Prandtl number is dependent on Pressure?

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Old   August 13, 2019, 08:33
Default How Prandtl number is dependent on Pressure?
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Raza Javed
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Hello Everyone,


I have a question related to the dependency of prandtl number on Pressure.


Air has a Prandtl number of 0.7 at atmospheric pressure.


If I want to lower the pressure of my fluid(air in my case) from atmospheric pressure then how can I find the new Prandtl number for this new pressure?



I know from the relation, that Prandtl number is not directly dependent on Pressure and it depends on thermal conductivity, specific heat and viscosity.


As I am changing the pressure, so I need to know how the Prandtl number will change?


Any help would be highly appreciated.


Thank you
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