[philiplu]

Hello,

most of the water wave tutorials in OF-doc have the outlet-BC as follows:

---------------------------------------------------------
outlet
{
alpha alpha.water;
waveModel shallowWaterAbsorption;
nPaddle 1;
}
---------------------------------------------------------

assuming that such outlet-BC is "open" to water,
but if the "outlet"-side is a wall, how could a wall-outlet-BC (where e.g. reflecting could also be enabled) be defined in water wave simulation?



thank you in advance

[Rasmusiwersen]

I am not entirely sure i understand your question.
If you want to make the outlet a wall, i would assume you can apply the wall type boundary condition to the "outlet", and the call the patch something else (so no confusion arise, as the patch wouldn't allow any flow to actually leave the model).
As to your comment made in my post previously, i am not sure if you want to include the reflection caused by the pertubed seabed? If so, I would say it is a question of the wave theory you use. For small waves nothing will happen, i.e. linear wave theory will suffice. For large waves, some of the bound harmonics can shoot off once exiting the pertubed area. For this you would need some degree of non-linearity.

In terms of post-processing, i've attached two pictures containing the free surface using Threshold and isoVolume respectively. These can be found in the "Filters" ribbon and choosing the "Alphabetical" option.

Hope this helps.

[philiplu]

hello, Rasmusiwersen,

I've also compiled an OFv7 and had a quick look in it, so know now:

the wave-tutorials in v7 and v1906 are different (i.e. different in the case-settings).

thus also wonder, in v7-waveCases where did you input the wave period?

[Rasmusiwersen]

Originally Posted by philiplu

hello, Rasmusiwersen,

I've also compiled an OFv7 and had a quick look in it, so know now:

the wave-tutorials in v7 and v1906 are different (i.e. different in the case-settings).

thus also wonder, in v7-waveCases where did you input the wave period?

Philip,

Unfortunately, I have not found an entry option for the wave Period in OpenFOAM version 7. I did find a correlation between the wave length (specified in the waveProperties) and the waveperiod. This was however quite a relatively vague and imprecise way of specifying it. Therefore I have turned to OpenFOAM version 1906, where the period specification is listed in the waveProperties dictionary.

Hope this helps you on your way.

Happy foaming.

[philiplu]

Hello, Rasmusiwersen,

thx for the reply.

probably you meant: you find the (v7-)period in an implicit way,
i.e. using a point over water surface by e.g. the "plot over time"-function of ParaView



have fun in your "waving" and keep in touch