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Hi,

I am working on Harbor oscillation (seiche) using ARTEMIS and I have realized my liquid boundary is forced only at the begining of my simulation.

Is there a way to force a swell on a larger period in ARTEMIS ?


In my .cas file, I already use this :
But, one more time, liquid boundaries are only forced for first frames, I would like it more longer.

Hope this has'nt been already asked,

Regards

Loïc

Hi Loïc,

ARTEMIS works under harmonic hypothesis in frequency domain. Are there is no "evolution" or time stepping, I don't really understand what you mean by 'begining' of the simualtion.

If you use the period scanning then ARTEMIS will perform N simulations with various incident wave periods, here from 4 to 800s... Do you call "first frames" the smallest periods ?

Regards,

Christophe

Hi Christophe,

It would be simpler with some pictures





On the first one, I can see swell coming from northern boundary, wich i asked for.
On the second one, 30 sec later, there is no more swell coming, only agitation and resonnance on my domain.

I would like to know if it is possible to force a swell not only at the beginin of my simulation but all my period scanning long.


Regards,

Loïc

HI Loïc,

I guess you're presenting the wave height in the first picture, right?
Are you sure you present the wave height in the second one?
Did you looked at the scale ? What are the min / max on your picture, how does it suit to the incident wave height ?

ARTEMIS should impose the same wave height and only change the period. A test to see if there is a bug in the period scanning would be to try to impose the Tmin+30s period to a single period case, just to check.

If you send me your case, I run it today or next wednesday.

which version are you using?

Regards,

Christophe

Yes, both figures present same parameter, and it's surface height, not wave height, my bad. By looking at the legend (with wave height parameter) the swell has 1m50+ amplitude even if I fixed 1m in my .f file.

If you want to check, i'm using v6p3 version.


Best regards,

Loïc

Oops I forgot a file, here it comes. Sorry for double-post, i didn't find "edit"




Regards

Your .cli file contains LIHBOR values (first column) of 5, which I didn't think were used in Artemis, only 1,7,4 and 2.

Hi OGW,

Indeed, my .cli file contained an error, yet I made it with BlueKenue.

However, I manually switched this column with 4, but the problem is still there, the swell seems to stop after few seconds.

Here the evolution at a point in the harbor where i expect 1m amplitude and a seiche period of 4-5 min. We can see an agitation at the begining and then it stop.

I'm not sure what you are expecting but I don't think the x-axis from the results of period scanning has units of time, rather each period simulated, see the Artemis manual

'... ARTEMIS performs a calculation for each of the periods specified. The results are stored in the results file (with period sampling if the key word GRAPHIC PRINTOUT PERIOD is used).'

Hi,

Indeed, I misunderstood ... I though about forcing a wave period and see what happens in my harbor for a duration. Thank you for having opened my eyes.


Regards

Loïc