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-   -   Zoom In problem (Grid distortion) (http://www.cfd-online.com/Forums/pointwise/128737-zoom-problem-grid-distortion.html)

xq712000 January 20, 2014 09:54

Zoom In problem (Grid distortion)
 
1 Attachment(s)
Hello,

I'm currently creating a structed mesh around a half simple geometry wing.

The wing size is around 2900, unit = cm

The first layer height near wing surface is 1.87e-4

The problem is that whenever i ZOOM IN around ANY vortex on the wing ,

the grid point on the connector near wing surface would jump irregularly,
(usually,this kind of spacing won't cause such problem of displaying)


I thought this was caused by a bad database (size too large) ,

but i tried different size and the problem remains

Interestingly, Pointwise acts the same as GridGen

More, I'v adjust the tolerances to match the model size ,

but it still didn't help.



Oh, I almost forget that I'v confirmed that it's NOT a problem of Displaying

'cause i'v used Tecplot to check the mesh , and it's really distorted


Can anyone solve this problem?

Please........

http://fmn.rrfmn.com/fmn059/20140107...00ef6e125d.jpg

tcarrigan January 22, 2014 10:23

Hello,

The problem should disappear when you switch on double precision graphics. In Pointwise, go to Edit, Preferences, and under the Graphics section enable Double Precision Graphics.

xq712000 January 23, 2014 08:41

Quote:

Originally Posted by tcarrigan (Post 471244)
Hello,

The problem should disappear when you switch on double precision graphics. In Pointwise, go to Edit, Preferences, and under the Graphics section enable Double Precision Graphics.

Thank you so much !
It worked ! ^_^

xq712000 January 23, 2014 08:46

BTW

In GridGen
Double Precision can be set : Disp — FramBuf — Graphics Prec


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