CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[ICEM] Pore scale meshing (Porous media)

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

Reply
 
LinkBack Thread Tools Display Modes
Old   July 19, 2017, 09:58
Default Pore scale meshing (Porous media)
  #1
Member
 
Kamal Bisht
Join Date: Jun 2015
Location: Germany
Posts: 43
Rep Power: 4
Bisht is on a distinguished road
Hello Guys,

I am facing a lot of problems during the pore scale meshing of the attached geometry. It consist of a porous media in the center of a hollow tube. I want to generated the mesh on pore scale to calculate the properties of the porous media.

Procedure I followed so far:

1) Imported the geometry in .stl format. Build topology with tolerance of 0.00001. It generated the curves and few free edges (yellow) which I deleted.

2) I created a cylindrical body enclosing the tube. This cylindrical body represents the fluid volume of the hollow tube. I didn't define any material point due to complexity of the porous media (it consists of many elements and it is not possible to define the material point for every element). I let ICEM mesher to define its own material point during flood fill process

3) Defined the Max. element size as 4, min- 0.5, edge criterion- 0.05 and compute it with Octree tetra.

I got the mesh in the pores and around it as I want (see attached image). It also genrated lots of material point for different parts.

Mesh check shows some multiple edges and unattached vertices which I fixed. After smoothing, the quality of the mesh remained very poor, the lowest value is 0.1.

When I am trying to export it to fluent, it showing many uncovered faces which were not highlighted during mesh checking. A second mesh check shows a lots of new problems with uncovered face, orientation, missing internal faces and so on.
It seems like with smoothing all of these problems keep increasing.

These uncovered faces are at different location so I can't attached it to a single element while fixing. To solve this problem, I merge all the material point of the solid bodies together after mesh generation and then attached uncovred faces to it but the problem still exist and I am not able to export this mesh to fluent.

I am new to ICEM CFD and don't know any other method to generate meshes on the pore scale.

I spent a lot of time on this problem but couldn't find any solution.
Can anyone have some idea on how to do it and reduced the problem arising in the meshin?
Attached Images
File Type: jpg porous media.jpg (48.6 KB, 14 views)
File Type: png Hollow tube with porous media.PNG (186.0 KB, 10 views)
File Type: png cylindrical body covering hollow tube.PNG (59.0 KB, 10 views)
File Type: png mesh.PNG (108.5 KB, 10 views)
File Type: png Mesh_a.PNG (108.7 KB, 11 views)
__________________
Regards,

Kamal
Bisht 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
Flow through two combined porous media with diffrent permeability Sandee Main CFD Forum 0 March 28, 2015 11:35
Porous Media coupled with internal flow Samuel Andrade FLUENT 2 August 26, 2012 09:43
Porous media boundary conditions aggie FLUENT 3 June 17, 2012 09:51
species mass source in porous media ? PK FLUENT 0 February 16, 2007 12:12
Testing the integrity of POROUS media and por jump Azman FLUENT 0 July 31, 2006 11:11


All times are GMT -4. The time now is 02:47.