strange problem with structured mesh
 

I am a novice in pointwise. I just want to try a structured mesh for a 10*10 rectangle. First I just set the dimension as 81 for each connector and made the structure domain, see figure.1 below. However when I increased the dimension to a higher number such as 91, it didn't work, why? see figure.2.
It is very strange and frustrated. Any help is appreciated.
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I suggest you to split the connector to half on all four sides and mesh for the four partitions.

That is strange. It should not be necessary to split the connectors for such a trivial grid.

I created such a domain but didn't see this problem. Can you attach the grid for me to look at? While you can't upload .pw files, if you change the extension to .zip, you can attach it.

Thank you so much, Chris. Please see the attach.
Attachment 29159

The forum didn't link the attachment. Send me a PM and you can arrange to email it to me.

Fangping

I loaded your .pw file into Pointwise and it looks OK (see image). Which version of Pointwise are you using?

It is V17.1R4.

That's the version I tested it with (see previous image).

Are you still experiencing this problem? My only suggestion at this point is to select the domain and reinitialize it (button with little blue square with yellow star on the corner).

Similarly for a very simple extrusion problem. If I set the dimension number less than 90 and extrudes it for 10 steps, it works (figure.1). However once I increases the dimension number over 90, it doesn't work neither (figure.2).:confused:
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That's very weird behavior. Do you see the same behavior if you use more than 91 points?

Yes, as long as I use more than 85 points it doesn't work.

Can you report to me the model and tolerance values from File>Properties.

If it's not that, I'm leaning towards this being some obscure platform related bug. Which OS are you running? 32 or 64bit?

model size: 1000.0
node: 0.0001
connector: 0.0001
grid point: 1.0e-7

my OS is 64-bit.
Thanks!

I did have one other thought. Can you change the display precision to double (Edit>Preferences, Graphics) and see if you get the same result. I might be a rendering issue.

If that's not it, I'm out of ideas :-/

Oh, it works, thank you so much, Chris!:D you helped me a lot.

Phew. Now that I know I am also able to replicate the issue. I'm surprised it was that sensitive.

Perhaps Pointwise can educate us on why that it does this. Strange when the range of floating point values only vary a couple of orders of magnitude. Perhaps you should submit a bug report and have them look at it.