[wwzhao]

Hi Jacobsen,

I've used waves2foam and it's really an excellent tool for generating waves.

Do you consider using cellZone to represent relaxationShape or relaxationZone?


Best,
Weiwen

[ngj]

Hallo Weiwen,

No, I do not have any plans of defining relaxation zones through cellZones. It should be possible, but can you come with some arguments for this?

Note that the current implementation allows for more flexibility in defining the local coordinate system and hence the spatial variation in the relaxation factors. Dual information should be provided to allow for that with cellZones.

Kind regards

Niels

[wwzhao]

Hi Niels,

Sorry for the late reply. We implemented a dynamic mesh moving with a running ship in waves, i.e., the grid is doing planar motion with the ship. So for us, it is more convenient to use cellZones instead of fixed regions to represent the relaxation zones.

About the local coordinate system for spatial variation for relaxation factors, I think we can refer to the patchLocal in refineMeshDict.

// - patchLocal : coordinate system different for every cell. Specify in
//   patchLocalCoeffs section below.
coordinateSystem patchLocal;

patchLocalCoeffs
{
    patch outside;  // Normal direction is facenormal of zero'th face of patch
    tan1 (1 0 0);
}

The local coordinate system is defined by a specific patch name through the dictionary. What's your opinions?


Best,
Weiwen

[ngj]

Hi Weiwen,

I believe that you will obtain the thing you want with the use of the frozen type of relaxation zone. First you define the shape as frozen and you can then use one of the regular shapes to define the cells. In your case, it means that the cellSet is not updated each time, which is exactly what you need on horizontally translating grids. It is also possible to restart the simulation.

Kind regards

Niels

[wwzhao]

Hi Niels,

Thanks for pointing out that. I will try to use frozen type and report back.


Best,
Weiwen