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raviteja gonnabathula July 2, 2020 08:06

Pressure farfield
 
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

agd July 2, 2020 10:52

Given those values your static pressure is correct.

raviteja gonnabathula July 2, 2020 12:30

Thank you.. what could be the solution

agd July 2, 2020 12:49

The solution for what? You haven't really provided enough information for anyone to understand your problem.

raviteja gonnabathula July 2, 2020 23:54

Quote:

Originally Posted by agd (Post 776706)
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

aero_head November 14, 2020 17:31

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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