Match BC changes connector point number and distribution
 

Hi,

I'm using Pointwise to mesh a simple block. When I want to use T-rex and apply the appropriate BCs (Fig. BCs), I'm getting a point stack near the last layer (Fig. Result) and this results in solution problems as expected due to poor mesh quality. What should I do in order to get a T-rex mesh as in Fig. "Desired"?

Thanks
Doruk

After, creating the T-Rex, Pointwise tries to have the spacing of the layer right after last T-Rex layer to be equal to that last T-Rex layer spacing. So you don't see the huge triangle right after T-Rex. This situation usually happens when the last cell of T-Rex has a high aspect ratio (thin and long rectangle).

To fix that, after you create your T-Rex, you can click the connector that has the stacked points (the match bc connector) and then click Grid -> Distribute. In that part, you can go to the Functions tab. You should see that it has a growth function enabled for that connector. And from the Legend, you should see that Begin has a triangle icon, Middle has a circle and End has a square icon. These icons can be seen on the connector you picked. In the Growth Distribution Parameters part (It should come enabled, but if it is not, click the box near it to enable it), you can see the settings for these three.

What you want to do in your case is to have the spacing right after the Middle to be much bigger than the last layer spacing of T-Rex. You should see that at the settings of Middle, Last Layer Spacing is the default choice. You can change that to User Specified Spacing and give a bigger spacing value to achieve the big triangle right after T-Rex ends. You can lower the total amount of points you have on that connector to complement the distribution change.

Another option is to have a break point at the last node of T-Rex layer but the above solution should work before you have to do that.

Hi Floydian,

Thank you for your explanatory reply. I followed the steps you mentioned; however, since it is a block, when I re-initialize to block, it again distorts the ends. I tried your second advise, which is using break points, earlier; however, it does not seem to work efficiently with blocks. I'm using it for 2-D well, but as I said, when it comes to blocks, I can't handle it.

Please correct me if I made any step wrong.

Sincerely
Doruk

Did you enable the T-Tex "Push Attributes" option?

Hi David,

Yes I did so. Otherwise much worse problems arise.

Thanks
Doruk