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

[ICEM] Vmtk & icem

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

Like Tree2Likes
  • 1 Post By diamondx
  • 1 Post By Far

Reply
 
LinkBack Thread Tools Display Modes
Old   April 17, 2013, 16:30
Smile Vmtk & icem
  #1
New Member
 
Vincent
Join Date: Apr 2013
Posts: 5
Rep Power: 4
drvincentip is on a distinguished road
Hi All,

I'm a beginner in learning how to use CFD model in doing hemodynamic analysis.
What I am doing is trying to convert the vessel geometry to CFD for analysis.
I'm using VMTK to extract the vessel geometry from MRA DICOM images and then export it to STL format.

I'm then stuck at this point as I don't know what to do next.
I'm using ANSYS 14.0 and I am able to import the geometry from the STL file I created in ICEM. But I don't know what to do afterwards?

Anyone help?

Thanks,
Vincent
drvincentip is offline   Reply With Quote

Old   April 17, 2013, 21:46
Default
  #2
Senior Member
 
Ahmed
Join Date: Mar 2009
Location: NY
Posts: 250
Rep Power: 9
Ahmed is on a distinguished road
Are you a medical student, bio-medical (mechanics) or mechanical engineering student?
That will not change the answer, but will define what language to use.
Blood pressure drop has generally been modeled as some sort of Poiseuille flow in Pipes, so what you need to do is to use ICEM to mesh the inside of the blood vessel, define an inlet and outlet/s boundary conditions (The walls of the vessel are defined as walls by default) then start the analysis Using ANSYS.
If what I wrote is not enough to help you, then I suggest to post again on The Ansys forum and attach an image of your domain or mesh that the fellows there can feel attracted to solve your problem
Good Luck

You can also read the tutorials of ANSYS
Ahmed is offline   Reply With Quote

Old   April 17, 2013, 23:35
Default
  #3
New Member
 
Vincent
Join Date: Apr 2013
Posts: 5
Rep Power: 4
drvincentip is on a distinguished road
Thanks Ahmed,
I'm a Neurology Specialist and doing research in CFD now.
I understand what you said and I think my problem is I don't know how to use ICEM to define the different boundaries.
Do you have any good books or tutorials to recommend??

Thanks!
drvincentip is offline   Reply With Quote

Old   April 18, 2013, 10:20
Default
  #4
Senior Member
 
Ahmed
Join Date: Mar 2009
Location: NY
Posts: 250
Rep Power: 9
Ahmed is on a distinguished road
Quote:
Originally Posted by drvincentip View Post
Thanks Ahmed,
I'm a Neurology Specialist and doing research in CFD now.
I understand what you said and I think my problem is I don't know how to use ICEM to define the different boundaries.
Do you have any good books or tutorials to recommend??

Thanks!
That is what I thought (The dr at the beginning of your screen name and the terminology used in your post) anyway, here is my sincere answer:-
1- Glad to know a Neurologist that loves/likes mathematics
2- Defining a Boundary in ICEM or any other mesh generator is a two step procedure

2.1 - collecting the area you want to define as boundary and defining it as a surface (Not needed for the walls, wall boundaries are the default value)
2.2 - Giving a name/tag to that surface.

When the mesh file is read into the solver, you would be able to assign the numerical values, in your case the inlet boundary would be given a constant inlet mass flow. The outlet boundary is already defined by the solver.
3- I guess what you need is some kind of a step by step tutorials,

3-1 Start by reading this,
http://www.vmtk.org/Tutorials/CenterlinesGmsh/
3-2 Read the first tutorials that come with ICEM (personally I never liked this programme, if you can, try using Gambit, it is more humane)
3-3 If you are doing your research at a university, then it might be a good time to reach their mechanical/aeronautical engineering departments and seek the help of a phd student/smart undergrad
Good luck
Ahmed is offline   Reply With Quote

Old   April 18, 2013, 13:09
Default
  #5
Super Moderator
 
diamondx's Avatar
 
Ghazlani M. Ali
Join Date: May 2011
Location: Canada
Posts: 1,291
Blog Entries: 23
Rep Power: 20
diamondx will become famous soon enough
Quote:
Originally Posted by drvincentip View Post
Thanks Ahmed,
I'm a Neurology Specialist and doing research in CFD now.
I understand what you said and I think my problem is I don't know how to use ICEM to define the different boundaries.
Do you have any good books or tutorials to recommend??

Thanks!
When you start icem, it shows you a customer number. use it to get an account in their customer portal. you will get access to a variety of tutorial and traning material... there is a sticky thread in this section of the forum, it gives a link to a very useful channel in youtube when you see meshing techniques...
drvincentip likes this.
__________________
Regards,
New to ICEM CFD, try this document --> http://goo.gl/G2gkE
Ali
diamondx is offline   Reply With Quote

Old   April 19, 2013, 00:46
Default
  #6
Far
Super Moderator
 
Far's Avatar
 
Sijal Ahmed Memon (turboenginner@gmail.com)
Join Date: Mar 2009
Location: Islamabad Pakistan
Posts: 3,971
Blog Entries: 6
Rep Power: 39
Far will become famous soon enoughFar will become famous soon enough
Send a message via Skype™ to Far
There is example on medical flow analysis and handling STL geometry in ICEM help files installed in your computer. Take a look on it.
drvincentip likes this.
Far is offline   Reply With Quote

Old   April 19, 2013, 15:00
Default
  #7
New Member
 
Vincent
Join Date: Apr 2013
Posts: 5
Rep Power: 4
drvincentip is on a distinguished road
Thank you very much! I found the tutorial in the help menu and I'll study it.
You guys rock!!!!
drvincentip is offline   Reply With Quote

Reply

Tags
ansys 14, cfd, icem, vmtk

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
PEM Fuel cell module meshes. ICEM vs workbench aarvay FLUENT 20 August 5, 2015 21:04
[ANSYS Meshing] Workbench 13: Structured Hexa Meshes rooftop ANSYS Meshing & Geometry 18 May 13, 2014 03:57
[ICEM] Different meshes from ICEM and GAMBIT Mojtaba.a ANSYS Meshing & Geometry 9 March 30, 2013 03:42
[ICEM] Meshing adjacent wall geometry and simple ICEM questions everdimension ANSYS Meshing & Geometry 25 June 20, 2012 04:25
Design Modeler to ICEM..... Joe CFX 0 January 24, 2008 04:39


All times are GMT -4. The time now is 09:46.