[nuovodna]

Hi, i setted up a 2d box with an inlet patch that generates a 1st order Stokes wave using groovyBC. The simulation stop to run (giving floating point exception) after 0.55 sec

This is the case

http://db.tt/Jiicy8A

[keul]

Hi Emanuele,

I runned your case with some modifications. In the alpha1 file, I changed the inlet condition by a zeroGradient and in the p_rgh file I changed the outlet condition by buyoantPressure. Now your case works fine.

Best regards

[nuovodna]

Hi mikael, thanks for your fast reply. I made the corrections that you suggested me but it still crashes. Now at t=6.8 sec

Regards

[keul]

When I runned your case, I put the tangentialVelocity in the U file at (0 0 0). Maybe your problem comes from that.

Rgrds

[nuovodna]

where do you put tangentialVelocity uniform (0 0 0); ?? On which patch?

Thanks

E

[keul]

In your U file, patch atmosphere, I replace (1 0 0) by (0 0 0)

[nuovodna]

Changing the value of tangentialVelocity it doesnt crash anymore. But the free surface prediction is wrong.
This is the graph of computed free surface (red) against analytical solution (green) at t=20 sec

[keul]

Maybe you could try with the program I use. It generates regular waves with the deep water hypothesis. You could compile the waveBC folder with wmake. I put a floating body tutorial.

[nuovodna]

I compiled waveBC yesterday but in the tutorial folder alpha1 file is missing. I grabbed it from shipHydrodynamicIG svn. Can you attach an example of waveBC on a case??

Thanks

Regards

E

[keul]

Sorry the file was to big.

[keul]

For the alpha1 file, you could use the same file as your case with zeroGradient on all patches except eventually atmosphere with an inletOutlet condition.

Good luck

[nuovodna]

I launched Allrun but the alpha1.org~ file is missing


cp: cannot stat `0/alpha1.org~': No such file or directory

Edit: Ok i ll try. Thanks!

Edit: It works. Now i m going to make some test

[ngj]

Hi

First of all, you have defined omega (w) differently in the alpha1.ORG and the U files in your input groovy file. This is most definitely one error in the input, which can result in the strange profiles in your post #7.

However, be aware, that linear wave theory will not yield the analytical solution in shallow water as the linear theory does not fulfill the boundary conditions for the non-linear wave problem at the inlet.

I am utterly surprised that the waveBC still exists out there, it has changed a bit since those years back, however I can still find my old comments in Danish I hope it works for you.

Best regards,

Niels

[nuovodna]

Hi Niels, thanks for your answer. I re-setted the case using an water depth >= Wavelength/2 but the results are still wrong (i'm using groovyBC). Do you know another system available in OF to generate waves?
Thanks in advance

Regards

Emanuele

[ngj]

Hi Emanuele

Yes, I have a different system, however currently I am working on a journal article, and the source will not be released prior to publication/acceptance of the article. I made a presentation of the framework at the Gothenburg workshop, see [1].

I have been working on a specific validation case for a long time without succes, so I will not be able to give a time line for the release.

Good luck,

Niels

[1]: http://web.student.chalmers.se/group...SlidesOFW5.pdf