CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

Adding moving solid in a flow

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   January 23, 2018, 07:10
Default Adding moving solid in a flow
  #1
New Member
 
None
Join Date: Jan 2018
Posts: 1
Rep Power: 0
lapri94 is on a distinguished road
Hello,

I have developed a model of a blood vessel and would like to add a moving tumour cell to study its displacement and deformation.

Is it possible to add a moving solid inside the vessel with Ansys.

Thank you in advance.
lapri94 is offline   Reply With Quote

Old   January 23, 2018, 09:37
Default
  #2
Senior Member
 
Gert-Jan
Join Date: Oct 2012
Location: Europe
Posts: 1,913
Rep Power: 28
Gert-Jan will become famous soon enough
Assuming the tumor is of the same size as the blood vessel (vain) then: is the tumor:
1) attached to the vain, so the tumor and the vain deform together?
2) or just transported by the blood through the vain?

For 1): If it is attached to the vain and the displacement and the deformation is limited, you can do this CFX with deforming mesh. If they are large, I would recommend Fluent or Star-CCM+ since you not only need deforming mesh, but also remeshing once in while, which is not possible in CFX.

For 2) Treat it as a DEM particle in Fluent or Star-CCM+.

Regs, Gert-Jan
Gert-Jan is offline   Reply With Quote

Old   January 23, 2018, 17:41
Default
  #3
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,854
Rep Power: 144
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
Gert-Jan: Dynamic remeshing is possible in CFX.

Other possible approaches could be lagrangian particle tracking or immersed solids. Which approach is suitable depends on exactly what you expect the tumour to do.
ghorrocks is offline   Reply With Quote

Old   January 23, 2018, 18:23
Default
  #4
Senior Member
 
Gert-Jan
Join Date: Oct 2012
Location: Europe
Posts: 1,913
Rep Power: 28
Gert-Jan will become famous soon enough
@Glenn. Since when? A few years ago it was impossible......

Indeed, Lagrangian particle tracking and immersed solids are also possible. However, LPT assumes the particle can be regarded as a point mass. So it does not occupy any volume in your simulation. It is very valuable approach for tiny particles, which could be a tumor cell. But if you want to study deformation, it won't add much.

Regarding immersed solids, I am not sure if it makes a valid combination with deforming meshes........... Glenn?
Gert-Jan is offline   Reply With Quote

Old   January 23, 2018, 18:26
Default
  #5
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,854
Rep Power: 144
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
CFX has had it for a few versions. It is done through a link with ICEM. There are tutorial examples on the ANSYS Customer webpage.

I do not think immersed solids works with deforming mesh.

Yes, all the approaches have limitations. But until we know the details of what he is modelling we do not know the appropriate model. It is up to lapri to explain the details off what he/she plans to model.
ghorrocks is offline   Reply With Quote

Reply

Tags
ansys, cfx & fluent


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
Thermally coupling 1D gas flow to 3D heat conduction in solid Pyotr CFX 5 March 6, 2017 22:46
Flow meter Design CD adapco Group Marketing Siemens 3 June 21, 2011 09:33
Moving Solid particle in a flow yigity83 CFX 13 July 14, 2009 09:48
Inviscid Drag at subsonic, subcritical Mach # Axel Rohde Main CFD Forum 1 November 19, 2001 13:19
gas solid flow in a pipe Pandu CFX 0 July 30, 2001 17:53


All times are GMT -4. The time now is 12:24.