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Why my calculation of Mach number is not the same as fluent

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Old   August 30, 2021, 10:24
Default Why my calculation of Mach number is not the same as fluent
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iiran
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Hello, everyone. I have a problem when I want to verify my inlet data on the supersonic fluid.
I use the equation “Mach number = Velocity / (1.4 * R * static temperature)”, and what amazing me is that when I substitute the following data into the equation, I find the Mach number is 2.4970 (R is 287.15 for air), but fluent shows that the mach number is 2.439456. So I wonder why this happens and how to get the real answer as fluent?


Thank you in advance!
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Old   August 30, 2021, 10:50
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Now I understand why , this because it uses the average number, I don't know how to delete this post, thank you for you reading.
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