CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Meshing & Mesh Conversion

[blockMesh] Hole in a cylinder / T-junction of two cylinders using blockMesh

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 26, 2018, 12:12
Default Hole in a cylinder / T-junction of two cylinders using blockMesh
  #1
Member
 
Anurag
Join Date: Aug 2014
Location: Germany
Posts: 57
Rep Power: 10
anuragm is on a distinguished road
Hi everyone,

I am trying to using blockMesh to create a simple 3D cylinder with a hole in one of the curved sides. The final geometry/mesh would be more complicated but this is a starting point. The aim is to have two cylinders, with one continuing through another at a 90 angle. But I think this point of intersection is where I would face the most problem. I tried it and have a 2D model already but I could not wrap my head around how to achieve this in 3D.

Is there a tutorial/example that does this? If not, what would be a good way to approach this problem?

I have attached a 2-D representation of my geometry as well!

Thanks in advance!
Attached Images
File Type: jpg horizontalSettler2D.jpg (60.9 KB, 70 views)
anuragm is offline   Reply With Quote

Old   February 26, 2018, 20:31
Default
  #2
Senior Member
 
Join Date: Aug 2013
Posts: 407
Rep Power: 14
Antimony is on a distinguished road
Hi,

Personally, looking at your geometry, I think blockMesh will probably not be the most suitable one for you.

I assume you can generate the CAD model. If so, snappyHexMesh would be a much better tool for you (than blockMesh) especially since you are dealing with complicated shapes.

Cheers,
Antimony
Antimony is offline   Reply With Quote

Old   February 27, 2018, 02:07
Default
  #3
Member
 
Anurag
Join Date: Aug 2014
Location: Germany
Posts: 57
Rep Power: 10
anuragm is on a distinguished road
Hi, Thanks for your reply.

I had come to the same conclusion myself but there was still a bit of uncertainty in my mind. So thanks for confirming that blockMesh is not the right tool for this job. I have made a STL geometry (but its not perfect as I made it using ICEM), and I tried to generate a mesh using cfMesh but there is no possibility of using O-grid in cfMesh. I am re-doing the geometry using Salome now, and will try the same process with snappyHexMesh.
anuragm is offline   Reply With Quote

Old   March 2, 2018, 01:14
Default
  #4
Senior Member
 
Join Date: Aug 2013
Posts: 407
Rep Power: 14
Antimony is on a distinguished road
Hi,

I was looking through blockMesh again (searching for something else) when I noticed that the newer version (OF 5) has been updated to handle cylinders and spheres (point projection) which might be of use to you...

Check out section 5.3.3: https://cfd.direct/openfoam/user-guide/blockmesh/

Cheers,
Antimony
Antimony is offline   Reply With Quote

Old   March 2, 2018, 08:36
Default
  #5
Member
 
Anurag
Join Date: Aug 2014
Location: Germany
Posts: 57
Rep Power: 10
anuragm is on a distinguished road
Quote:
Originally Posted by Antimony View Post
Hi,

I was looking through blockMesh again (searching for something else) when I noticed that the newer version (OF 5) has been updated to handle cylinders and spheres (point projection) which might be of use to you...

Check out section 5.3.3: https://cfd.direct/openfoam/user-guide/blockmesh/

Cheers,
Antimony
Thanks for this information. This looks interesting, indeed!

This is quite new for me & I am just thinking out loud at the moment but perhaps I could project 3 vertices from the angular pipe onto the cylinder body and then define an arc using them. This has to be done for each outer O-grid block, right? I will look into it this weekend.
anuragm 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
Flow past a 2D cylinder - High Re (1E+05) - Cd too high Pervispasco OpenFOAM Running, Solving & CFD 4 March 14, 2022 02:19
[blockMesh] How to create a T-junction cylinder with blockMesh Blanca OpenFOAM Meshing & Mesh Conversion 1 February 24, 2018 06:24
[blockMesh] OpenFOAM- Problem with BlockMesh of Cylinder NightWing OpenFOAM Meshing & Mesh Conversion 0 December 7, 2015 07:04
benchmark: flow over a circular cylinder goodegg Main CFD Forum 12 January 22, 2013 11:47
Cutting a hole in the engine cylinder head in KIVA CWL Main CFD Forum 6 January 7, 2010 06:37


All times are GMT -4. The time now is 22:37.