Connect inflation layers around a corner between two split bodies

Hi,

I tried T-Rex several times and got the following problem now:

As you can see, the inflation layers alsways end in the edges between the blocks. (The porous body is between the red lines, the other 2 bodies are fluid)

Is there a specific setting to connect it around the corner and also between blocks in general?

Thank you!

Hi, 

Thank you very much for the additional image. Now I better understand the topology you are working with. 

The T-Rex algorithm on the lower red interface domain stops because this domain hasn't been set to a Match T-Rex boundary condition. In addition, you need the Push Attributes turned on. 

As for the top red interface domain, T-Rex won't be able to make the 90 degree turn with the topology as-is. Even if you set the top red domain to a Match T-Rex BC, both BCs, the Wall and  the Match will be coplanar preventing the result you are looking for. 

One possible option in this case would be to change the topology slightly and move the red block down just enough to allow the T-Rex algorithm to make the desired turn (image below).

Please let me know if this would be a reasonable approach for you., 

Best regards.

Hi,

Yes I will try that.

But in this case, extruding in normal direction should also work, right?

Because it connects smoother than T-Rex cells.

Thank you!

Hi, 

You are very welcome. 

In my experience, T-Rex is usually what will allow for a nice transition in corner cases like this one. As far as I can tell, and considering I don't have the entire geometry, my last image looks pretty similar to your original image depicting your end goal. Based on this, T-Rex with the slight topology change would be my recommendation. 

That being said, you are welcome to give the normal extrusion a try but I suspect you may need to define additional topology in that corner in order to make the turn you are looking for. 

I hope this helps. 

Best regards. 

Hi,

 the normal extrusion worked pretty well around the corner:

After working with this, I got two more questions.

1. How is it possible to define conformal surface meshes between the two large areas to create a periodic boundary (next picture, 2 red arrows show the 2 domains of the boundary layer at the bottom and the surface mesh above)?

I only found out that I can go by rotating. But this would destroy the block with my boundary layer because the extrude also creates a separate block.

Is there a way to simply select the surfaces and set matching surface meshes as a boundary condition?

2. Do you know how to use hex dominant meshing for volume meshes? I only found the surface mesh option with hexes and tets. I am pretty sure there is also an option to use it in volume meshes somewhere.

Thanks for your help, I really appreciate it!