[Soto]

Dear All,

I've been trying to simulate the behavior of a droplet impacting a wettability-patterned mesh i.e. a (woven) mesh with one side being hydrophobic, and the other hydrophilic.

My approach is to import a CAD part that I made, and then create this wettability contrast line by splitting the boundary by function. The (useful) order of events is as follows:

1. Assign region to parts (checking 1 region/part surface). I do this on a subtracted region as usual.
2. Generate the mesh.
3. Combine the faces that make up the mesh (the software does not treat the
mesh as a single entity, but rather as bunches of 'spaghetti' from which I
made the CAD, hence the need to combine).
4. I split the mesh by function at the position I wish. This creates two Regions, and the mesh is undone.
5. Because of the split, I have to remesh. Now if I simply mesh
again, the boundary will be 'recombined' leaving me with the original
boundary and a boundary that doesn't correspond to anything. Trying to run
the simulation like that does not work. If I remove the part assignment on
the original boundary, I cannot mesh anymore.


The worst part: I have managed to launch one good simulation with contrast-line defined and the mesh installed properly, but I do not recall the order of events unfortunately. I've tried to kind of re-do what I did, but it seems like I'm missing something.

Any idea is welcome (and let me know if you need more information!), please find attached an image for better understanding.

Kind regards,

Soto