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Old   July 22, 2015, 20:05
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  #21
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David Garlisch
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Follow these steps...
  • File / Import / Database...
    • Shell Split Angle = 0.0
    • OK
    • FM-02.stl
  • Translate database shell entity to Origin
  • Goto the Defaults Tab
    • Average dS = 2.0 (will generate 1001 pts on short edge, 3001 pts on long edge)
    • Max. Dimension = 4000
  • Set Grid / Type / Structured grid mode
  • Select Shell database entity
  • Create / On Database Entities...
    • Select: Domains radio button
    • Check: Connector Split Angle = 60.0
    • OK
  • Wait a long time... All done!

Use Examine / Database Associativity... to verify that all points are constrained.

It appears that On Database Entities... uses nearest-point projection. This can result in some weird or degenerate quad shapes.

If you want or need regular quad shapes (when using -Zview), you need to reproject the structured domain onto the shell using linear Z projection. See Edit / Project... menu.
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Old   July 23, 2015, 08:05
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Honey
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Here is what I have got:
https://onedrive.live.com/redir?resi...hint=folder%2c
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Old   July 23, 2015, 08:30
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I would like to appreciate your great help. Thank you so much, dear David!
Quote:
Originally Posted by dgarlisch View Post
Follow these steps...
  • File / Import / Database...
    • Shell Split Angle = 0.0
    • OK
    • FM-02.stl
  • Translate database shell entity to Origin
  • Goto the Defaults Tab
    • Average dS = 2.0 (will generate 1001 pts on short edge, 3001 pts on long edge)
    • Max. Dimension = 4000
  • Set Grid / Type / Structured grid mode
  • Select Shell database entity
  • Create / On Database Entities...
    • Select: Domains radio button
    • Check: Connector Split Angle = 60.0
    • OK
  • Wait a long time... All done!

Use Examine / Database Associativity... to verify that all points are constrained.

It appears that On Database Entities... uses nearest-point projection. This can result in some weird or degenerate quad shapes.

If you want or need regular quad shapes (when using -Zview), you need to reproject the structured domain onto the shell using linear Z projection. See Edit / Project... menu.

Sorry, wrong message!

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Old   July 23, 2015, 12:05
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David Garlisch
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I am glad to help. I assume it worked?

The neither of the links worked for me.
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Old   July 23, 2015, 12:11
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Yes, It worked
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Old   July 23, 2015, 12:47
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Quote:
Originally Posted by Honey View Post
Yes, It worked
Wonderful.

And just so you know.

If you will be doing this type of terrain gridding frequently. It may be possible to automate the process using Pointwise Glyph scripting.

Take a look at the Glyph 2 Manual. Also, there are many script example on the Pointwise Github repo.

I suggest that you create a journal script (Script / Begin Journaling...)to record the steps you take to make a mesh. It will produce a good starting point to make an automated script.

Good luck!
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Old   July 28, 2015, 14:57
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Quote:
Originally Posted by dgarlisch View Post
Follow these steps...
  • File / Import / Database...
    • Shell Split Angle = 0.0
    • OK
    • FM-02.stl
  • Translate database shell entity to Origin
  • Goto the Defaults Tab
    • Average dS = 2.0 (will generate 1001 pts on short edge, 3001 pts on long edge)
    • Max. Dimension = 4000
  • Set Grid / Type / Structured grid mode
  • Select Shell database entity
  • Create / On Database Entities...
    • Select: Domains radio button
    • Check: Connector Split Angle = 60.0
    • OK
  • Wait a long time... All done!

Use Examine / Database Associativity... to verify that all points are constrained.

It appears that On Database Entities... uses nearest-point projection. This can result in some weird or degenerate quad shapes.

If you want or need regular quad shapes (when using -Zview), you need to reproject the structured domain onto the shell using linear Z projection. See Edit / Project... menu.
Dear David,

Examine command with database associativity showed that 100% of generated points are on the database. As mentioned earlier, it is required to have a high quality hex mesh everywhere throughout the domain for the simulation. Thus, based on your suggestion, the structured domain has been selected and linear projection with Z-axis on target database has been applied to improve the quad grids over the more detailed area. But, I noticed no change on grid though the projection summary showed that 100% has been projected. At this stage, I decided to split the structured domain into several pieces and then increase the number of grid points and observe the change over the smallest domain but it did not help. Here https://onedrive.live.com/redir?resi...hint=file%2c7z you can take a look at what I have done so far. I would be glad to hear your valuable comments/suggestions to complete this task. I should add that I am still very new to Pointwise and have to learn many things, yet!

Kind regards
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Old   July 28, 2015, 16:09
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This works best if you join the domains into two domains. See image. You do not want any connectors on the interior of the terrain region.

After joining the domains, you must unconstrain and initialize the terrain domain before doing the z projection.

To unconstrain and initialize:
  • Grid / Solve...
  • Goto Attributes tab
  • Surface Shape section
    • Shape = Free
    • Apply
  • Goto Solve tab
    • Press Initialize button
      • the domain is now flat
  • Goto Attributes tab
  • Surface Shape section
    • Shape = Database
    • Projection Method = Linear
    • Check Use Default
      • The projection arrows should point in Z direction
    • Apply
  • Goto Solve tab
    • Press Initialize button (wait)
      • the domain is now z-projected
  • OK
Attached Images
File Type: png trnsltdToOriginPrjctdSplitd-JoinedDoms.png (71.9 KB, 23 views)
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Old   December 6, 2020, 10:17
Default pointwise tutorial
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reza sayareh
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hi guys i am trying to generate a mesh on 2D VAWT and i want to use pointwise but i cant find any tutorial on internet, could any one help me with it.
i forgot to mention that i fount meshing on the single airfoil:confused but not a hole VAWT.
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