Only NaN values for my Airfoil simulation

[Stian Hjorteland]

Hi guys!

My Airfoil simulation is running, and everything looks good. However, when opening it in ParaView i only have NaN values. I checked my simulation by printing the forces on the airfoil (soln-plugin-fluidforce-airfoil), and they are all NaN. I have uploaded my case, and i am very thankfull for any tips!

Any ideas on why this is happening?

Stian

[Giorgio Giangaspero]

Hi Stian

if you see any NaN, i.e. not-a-number, it means that your simulation has diverged and you do not have a valid solution. 

You should start from scratch. Try decreasing the dt, or the polynomial order or both.

Best

Giorgio

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[Stian Hjorteland]

Tried with dt= 0,000001, and 1.st order as well. No luck there!

Any other suggestion?

Thanks for helping!

tirsdag 24. mars 2020 15.18.57 UTC+1 skrev Giorgio Giangaspero følgende:

Hi Stian

if you see any NaN, i.e. not-a-number, it means that your simulation has diverged and you do not have a valid solution. 

You should start from scratch. Try decreasing the dt, or the polynomial order or both.

Best

Giorgio

On Tue, Mar 24, 2020 at 12:18 PM Stian Hjorteland <stian.h...@gmail.com> wrote:

Hi guys!

My Airfoil simulation is running, and everything looks good. However, when opening it in ParaView i only have NaN values. I checked my simulation by printing the forces on the airfoil (soln-plugin-fluidforce-airfoil), and they are all NaN. I have uploaded my case, and i am very thankfull for any tips!

Any ideas on why this is happening?

Stian

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