CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Mesh Generation & Pre-Processing Software > Pointwise & Gridgen

Falling to do Block Assembling

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree1Likes
  • 1 Post By cnsidero

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 13, 2013, 04:32
Default Falling to do Block Assembling
  #1
New Member
 
Y Yang
Join Date: Nov 2012
Posts: 25
Rep Power: 13
andromeda91 is on a distinguished road
Hi Everyone,

I am trying to create a mesh around the wing. I have already meshed the wing and farfield domain. However, when I was trying to do assemble the block, I could not do it.
In the creating block menu, I can not press "Okay" after selecting all domains.

How can I solve this problem? Any help would be appreciated.
andromeda91 is offline   Reply With Quote

Old   November 13, 2013, 11:12
Default
  #2
Senior Member
 
Chris Sideroff
Join Date: Mar 2009
Location: Ottawa, ON, CAN
Posts: 434
Rep Power: 22
cnsidero is on a distinguished road
Quote:
Originally Posted by andromeda91 View Post
Hi Everyone,

I am trying to create a mesh around the wing. I have already meshed the wing and farfield domain. However, when I was trying to do assemble the block, I could not do it.
In the creating block menu, I can not press "Okay" after selecting all domains.

How can I solve this problem? Any help would be appreciated.
Yosheph you'll have to give us a few more details. What type of domains have you created? What type of block are you trying to create? A couple of solutions pop into my mind but it'll be easier if you provide more details first.
cnsidero is offline   Reply With Quote

Old   November 13, 2013, 13:20
Default
  #3
New Member
 
Y Yang
Join Date: Nov 2012
Posts: 25
Rep Power: 13
andromeda91 is on a distinguished road
Quote:
Originally Posted by cnsidero View Post
Yosheph you'll have to give us a few more details. What type of domains have you created? What type of block are you trying to create? A couple of solutions pop into my mind but it'll be easier if you provide more details first.
Hi Chris,

I am still learning how to use Pointwise. I am planning to create O-grid type domain. I have created the wing domain. The wing is meshed with hybrid T-Rex near the leading edge and trailing edge. I also created the hemispherical farfield domain. The mesh type of this domain is unstructured. The block type that I am planning to create is unstructured one.
andromeda91 is offline   Reply With Quote

Old   November 13, 2013, 13:59
Default
  #4
Senior Member
 
Chris Sideroff
Join Date: Mar 2009
Location: Ottawa, ON, CAN
Posts: 434
Rep Power: 22
cnsidero is on a distinguished road
Quote:
Originally Posted by andromeda91 View Post
Hi Chris,

I am still learning how to use Pointwise. I am planning to create O-grid type domain. I have created the wing domain. The wing is meshed with hybrid T-Rex near the leading edge and trailing edge. I also created the hemispherical farfield domain. The mesh type of this domain is unstructured. The block type that I am planning to create is unstructured one.
Unstructured then. FYI, O-grid refers to a type of structured mesh.

Since you're new to PW you're likely not going to use multiple blocks or using a baffle so the first thing to check is that all the connectors are used by 2 and only domains. The way to do this is with Grids > Merge.

At the top of this panel is a table. All the connectors should be Manifold and colored cyan in the display. If there are any Free or Non-Manifold connectors you need to merge them together. The totally automated way is Auto Merge. Simply enter a reasonable tolerance (a good guess in your case might be 3 orders of magnitude smaller than the wing's chord length) and click Apply. All the connectors should now be Manifold. If not try increasing the tolerance slightly. Rinse and repeat.

Exercise a little caution though because you don't want to use a tolerance large enough to merge away necessary features. If you get to a tolerance that's within an order of magnitude of your surface mesh spacing something else is likely the problem.

If that doesn't seem to work or it's not giving the results you want, you might have to post of picture of your mesh.
kamran.iranshahi likes this.
cnsidero is offline   Reply With Quote

Old   November 14, 2013, 03:17
Default
  #5
New Member
 
Y Yang
Join Date: Nov 2012
Posts: 25
Rep Power: 13
andromeda91 is on a distinguished road
Quote:
Originally Posted by cnsidero View Post
Unstructured then. FYI, O-grid refers to a type of structured mesh.

Since you're new to PW you're likely not going to use multiple blocks or using a baffle so the first thing to check is that all the connectors are used by 2 and only domains. The way to do this is with Grids > Merge.

At the top of this panel is a table. All the connectors should be Manifold and colored cyan in the display. If there are any Free or Non-Manifold connectors you need to merge them together. The totally automated way is Auto Merge. Simply enter a reasonable tolerance (a good guess in your case might be 3 orders of magnitude smaller than the wing's chord length) and click Apply. All the connectors should now be Manifold. If not try increasing the tolerance slightly. Rinse and repeat.

Exercise a little caution though because you don't want to use a tolerance large enough to merge away necessary features. If you get to a tolerance that's within an order of magnitude of your surface mesh spacing something else is likely the problem.

If that doesn't seem to work or it's not giving the results you want, you might have to post of picture of your mesh.
Thank you very much. It works perfectly fine.
andromeda91 is offline   Reply With Quote

Old   April 15, 2024, 00:28
Default
  #6
New Member
 
Isaac Hiew
Join Date: Jan 2024
Posts: 2
Rep Power: 0
isaachty is on a distinguished road
Quote:
Originally Posted by cnsidero View Post
Unstructured then. FYI, O-grid refers to a type of structured mesh.

Since you're new to PW you're likely not going to use multiple blocks or using a baffle so the first thing to check is that all the connectors are used by 2 and only domains. The way to do this is with Grids > Merge.

At the top of this panel is a table. All the connectors should be Manifold and colored cyan in the display. If there are any Free or Non-Manifold connectors you need to merge them together. The totally automated way is Auto Merge. Simply enter a reasonable tolerance (a good guess in your case might be 3 orders of magnitude smaller than the wing's chord length) and click Apply. All the connectors should now be Manifold. If not try increasing the tolerance slightly. Rinse and repeat.

Exercise a little caution though because you don't want to use a tolerance large enough to merge away necessary features. If you get to a tolerance that's within an order of magnitude of your surface mesh spacing something else is likely the problem.

If that doesn't seem to work or it's not giving the results you want, you might have to post of picture of your mesh.
Hi there, I stumbled across this thread and I would like to ask if any of you can suggest some video tutorials, reference books, or any other useful resources for meshing an unstructured aircraft using Pointwise. I've been using Cadence CFD, other YouTube videos, and even the Bilibili Chinese teaching platform but to no avail, it is still difficult to find a useful tutorial on meshing an aircraft. I hope to hear from any of you soon!
isaachty is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[blockMesh] Mixer mesh - negative volume problem jadtwo OpenFOAM Meshing & Mesh Conversion 2 November 6, 2014 17:37
foamLog not solving for Ux, Uy, Uz aerospain OpenFOAM Post-Processing 5 April 18, 2012 11:01
[ICEM] Quest for seemingly simple Blocking (degenerate block) la7low ANSYS Meshing & Geometry 0 July 12, 2011 20:48
[Commercial meshers] Icem Mesh to Foam jphandrigan OpenFOAM Meshing & Mesh Conversion 4 March 9, 2010 03:58
blockMesh: block with 6 vertexes dani OpenFOAM 3 June 25, 2009 14:13


All times are GMT -4. The time now is 00:58.