Mesh for porous media

LB_K · October 15, 2013, 11:11

Hello.

I have a binary array (1 - is void, 0 - rock). Is there any method to convert such array to foam mesh?

typical slice of pore -

olivierG · October 16, 2013, 08:54

hello,

I do not know if there is a straightforward tools for this task, but you may try this method:

1) create a mesh (with blockmesh or other) of a big box (should be the size of your domain array, or bigger ?)
NB: mesh should be fine enough to get small cavity.
2) try to map your binary data to a field: take a look at how we can export data from coordinate to the mesh structure. Don't know how to do this here, but this is possible.
3) with topoSet, you can create a cellset with source as a "fieldToCell": you can extract here void and rock cellset
4) then you can keep only void cells, or both is your are going to do multiregion. Use "subSetMesh" to get your mesh from the cellSet.
5) refine your mesh if needed with refineMesh.

As you can see, the only difficult part is n°2: mapping your field data in OF.

good luck,

regards,
olivier

elvis · October 16, 2013, 11:18

Hi,

i would suggest to read
"Simulation Of Displacement Efficiency In Micromodels"
T. Clemens*, K. Tsikouris**
from "Open Source CFD International Conference 2011"
usually you should get presentations http://www.opensourcecfd.com/conference2013/
but there are dead links!! so the "Previous Events" will not work as I tried today

jherb · February 4, 2014, 11:37

A talk with similar title was given here:
http://www.openfoamworkshop.org/6th_...m_Tuesday.html

LB_K · February 4, 2014, 14:22

Thanks for your answers. i've solved my problem by writing a script in python.

October 15, 2013, 11:11	Mesh for porous media	#1
LB_K New Member LB_K kjk Join Date: Nov 2011 Location: Moscow, Russia Posts: 9 Rep Power: 14	Hello. I have a binary array (1 - is void, 0 - rock). Is there any method to convert such array to foam mesh? typical slice of pore -

October 16, 2013, 08:54		#2
olivierG Senior Member Olivier Join Date: Jun 2009 Location: France, grenoble Posts: 272 Rep Power: 17	hello, I do not know if there is a straightforward tools for this task, but you may try this method: 1) create a mesh (with blockmesh or other) of a big box (should be the size of your domain array, or bigger ?) NB: mesh should be fine enough to get small cavity. 2) try to map your binary data to a field: take a look at how we can export data from coordinate to the mesh structure. Don't know how to do this here, but this is possible. 3) with topoSet, you can create a cellset with source as a "fieldToCell": you can extract here void and rock cellset 4) then you can keep only void cells, or both is your are going to do multiregion. Use "subSetMesh" to get your mesh from the cellSet. 5) refine your mesh if needed with refineMesh. As you can see, the only difficult part is n°2: mapping your field data in OF. good luck, regards, olivier Last edited by olivierG; October 16, 2013 at 08:58. Reason: missing info.

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October 16, 2013, 11:18		#3
elvis Senior Member Elvis Join Date: Mar 2009 Location: Sindelfingen, Germany Posts: 620 Blog Entries: 6 Rep Power: 24	Hi, i would suggest to read "Simulation Of Displacement Efficiency In Micromodels" T. Clemens, K. Tsikouris* from "Open Source CFD International Conference 2011" usually you should get presentations http://www.opensourcecfd.com/conference2013/ but there are dead links!! so the "Previous Events" will not work as I tried today

February 4, 2014, 11:37		#4
jherb Senior Member Joachim Herb Join Date: Sep 2010 Posts: 650 Rep Power: 21	A talk with similar title was given here: http://www.openfoamworkshop.org/6th_...m_Tuesday.html

February 4, 2014, 14:22		#5
LB_K New Member LB_K kjk Join Date: Nov 2011 Location: Moscow, Russia Posts: 9 Rep Power: 14	Thanks for your answers. i've solved my problem by writing a script in python.