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Old   July 2, 2020, 08:06
Default Pressure farfield
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RaviTeja Gonnabathula
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Hi guys,
I'm running supersonic flow simulation is fluent.
I'm using pressure far field boundary condition for inlet
where I'm providing the details of
  • Static Pressure
  • Mach Number
  • Temperature

In my problem statement stagnation pressure is mentioned ... so i have to convert it into static pressure by using the below formula

P_stagn = P_static (1+(gamma-1)/2 X Mach Number^2 )^(gamma/(gamma-1))

P_stagn= 296000 Pa
Mach number = 2.18
gamma = 1.4

I calculated static pressure by using the above values and then the static pressure is 28562.51569 Pa


Am I in the right way in calculations?

I got the doubt because my solution is not getting appropriate results, I thought it might be issue with calculation..

Pls help me
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Old   July 2, 2020, 10:52
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agd
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Given those values your static pressure is correct.
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Old   July 2, 2020, 12:30
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RaviTeja Gonnabathula
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Thank you.. what could be the solution
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Old   July 2, 2020, 12:49
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The solution for what? You haven't really provided enough information for anyone to understand your problem.
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Old   July 2, 2020, 23:54
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RaviTeja Gonnabathula
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Quote:
Originally Posted by agd View Post
The solution for what? You haven't really provided enough information for anyone to understand your problem.
I'm getting divergence in the solution
Mesh statistics:
Orthogonal quality : 0.99652 (avg )
Skewness : 4.548e-2
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Old   November 14, 2020, 17:31
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Kira
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Hello RaviTeja,

Are you running your simulation in single or double precision? Also, what is the timestep you are using for your simulation?
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boundary condition, fluent, freestream pressure, pressure farfield

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