CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Pointwise & Gridgen

Has anybody used the rotate tool of Pointwise?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 12, 2011, 16:17
Default Has anybody used the rotate tool of Pointwise?
  #1
New Member
 
huaibao zhang
Join Date: Feb 2011
Posts: 14
Rep Power: 6
paulzhang is on a distinguished road
I want to revolve a domain to a block comprising of its path. Is there any way to make it in Pointwise?

Please shed a light.
paulzhang is offline   Reply With Quote

Old   February 13, 2011, 18:16
Default
  #2
Senior Member
 
John Chawner
Join Date: Mar 2009
Location: Fort Worth, Texas, USA
Posts: 219
Rep Power: 9
jchawner is on a distinguished road
Hi Paul,

Yes, you can revolve a domain around an axis to create a block. It's part of the Extrude suite of tools. In the Create menu look for Extrude and then choose Rotate from the pull-right menu. You then define the axis about which to rotate, the degrees to rotate, and how many steps to take.

The extrude suite also includes tools for extruding along a line (Translate), along a curve of any shape (Path), and simply orthogonally relative to the domain's original shape (Normal).

Hope this helps.
__________________
John Chawner / jrc@pointwise.com / www.pointwise.com
Blog: http://blog.pointwise.com/
on Twitter: @jchawner
jchawner is offline   Reply With Quote

Old   February 13, 2011, 19:38
Default Thanks so much John.
  #3
New Member
 
huaibao zhang
Join Date: Feb 2011
Posts: 14
Rep Power: 6
paulzhang is on a distinguished road
Hi John. I really appreciate it your help. I tried that once.
Let me explain what I want and what I did at first. I need to draw a sphere–biconic with a nose radius of 0.01905 m (0.75 in.) and total length of 0.1488 m. First of all I draw a 2-D geometry, made the grid( Unstructured grid in the nose and structured in the tail). Then I selected the Rotate in the menu. And then step is one, degree is 360, axis selection curve and I selected one line at the bottom. In the end I MLB run. Some error comes. Then I tried to use 90 degrees. But the result is what the attachment shows. There are only the initial and end positions saved, while the path is not the one.




Quote:
Originally Posted by jchawner View Post
Hi Paul,

Yes, you can revolve a domain around an axis to create a block. It's part of the Extrude suite of tools. In the Create menu look for Extrude and then choose Rotate from the pull-right menu. You then define the axis about which to rotate, the degrees to rotate, and how many steps to take.

The extrude suite also includes tools for extruding along a line (Translate), along a curve of any shape (Path), and simply orthogonally relative to the domain's original shape (Normal).

Hope this helps.
Attached Images
File Type: jpg PointwiseProblem.jpg (90.1 KB, 42 views)
paulzhang is offline   Reply With Quote

Old   February 13, 2011, 20:40
Default
  #4
Senior Member
 
John Chawner
Join Date: Mar 2009
Location: Fort Worth, Texas, USA
Posts: 219
Rep Power: 9
jchawner is on a distinguished road
I think the problem is where you write "step is one." The number of steps should be the number of grid points you want in the extruded direction. If you say just one step then it does the entire angle sweep (90 degrees) in one step and then connects to the original. So that's a straight line. You need to set the number of steps to something like 21 or something.

But I also want to point out that you have a singularity (pole) in the surface mesh that lies on the axis of rotation. I'm not certain what types of cells will result. I recommend that you change the mesh topology to get that pole off the axis.

Best Regards
__________________
John Chawner / jrc@pointwise.com / www.pointwise.com
Blog: http://blog.pointwise.com/
on Twitter: @jchawner
jchawner is offline   Reply With Quote

Old   February 13, 2011, 20:52
Default
  #5
New Member
 
huaibao zhang
Join Date: Feb 2011
Posts: 14
Rep Power: 6
paulzhang is on a distinguished road
Exactly John. It works.

Quote:
Originally Posted by jchawner View Post
I think the problem is where you write "step is one." The number of steps should be the number of grid points you want in the extruded direction. If you say just one step then it does the entire angle sweep (90 degrees) in one step and then connects to the original. So that's a straight line. You need to set the number of steps to something like 21 or something.

But I also want to point out that you have a singularity (pole) in the surface mesh that lies on the axis of rotation. I'm not certain what types of cells will result. I recommend that you change the mesh topology to get that pole off the axis.

Best Regards
paulzhang is offline   Reply With Quote

Old   February 13, 2011, 20:56
Default
  #6
New Member
 
huaibao zhang
Join Date: Feb 2011
Posts: 14
Rep Power: 6
paulzhang is on a distinguished road
Hey John. I may have a rather wrong understanding of the term Pole. I thought it is used in substitute of line. For example in my case, I want to assign unstructured grid in the nose region. But the region is fan-shaped. There is no way to make that except to put a pole there right?


Quote:
Originally Posted by jchawner View Post
I think the problem is where you write "step is one." The number of steps should be the number of grid points you want in the extruded direction. If you say just one step then it does the entire angle sweep (90 degrees) in one step and then connects to the original. So that's a straight line. You need to set the number of steps to something like 21 or something.

But I also want to point out that you have a singularity (pole) in the surface mesh that lies on the axis of rotation. I'm not certain what types of cells will result. I recommend that you change the mesh topology to get that pole off the axis.

Best Regards
paulzhang is offline   Reply With Quote

Reply

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Native OpenFOAM interface in Pointwise cnsidero OpenFOAM Meshing & Mesh Conversion 41 May 20, 2012 18:30
Pointwise Lodda Pointwise & Gridgen 0 October 8, 2010 02:07
Modeling of a Forging Tool. hydro CFX 1 May 19, 2010 18:35
Native OpenFOAM interface in Pointwise Chris Sideroff Main CFD Forum 0 January 16, 2009 13:37
ScalePoints tool cedric_duprat OpenFOAM Mesh Utilities 6 September 19, 2008 03:15


All times are GMT -4. The time now is 07:26.