[shivasluzz]

Is it possible to subtract one block from another block?

I have a axisymmetric model. But it has a radial hole in it.
I planned to do the following steps:
1. Create a section curve.
2. Carry out 2D planar blocking.
3. Use 2D to 3D block conversion option & rotate the block.
4. Make a block for the hole alone from its curve and surfaces.
5. Subtract the 'hole' block from the main block.
6. Apply O-grid around the hole

Here I don't know how to do step no.5!
Anybody knows then plz help me.
If anybody knows some other better method to do structured mesh on a axisymmetric model with some holes it (which are not distributed uniformly or symmetrically) then please tell me.
Also I tried the Multizone method. But the inner volume gets filled with terra element and it results in more element count.

Thanks

[stuart23]

Hi Sluzzer,

You cannot subtract blocks, but you can delete blocks. If you block everything so that there is one block covering the void and o-grid region in your model, then you can perform the o-grid split and delete the central block that has the hole. I would also suggest that you do this all in 2d before converting to 3d as it will be easier.

Of course there are multiple ways to achieve the same outcome, but this is the process I would take.

Good Luck

Stu

[shivasluzz]

Thanks Stuart!
But in my case hole is at only one place and so I cannot include it in the 2D. Also, as I told, the two block overlaps! And I want to delete only the intersection part. How to delete that