CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > ANSYS Meshing & Geometry

Problems with circular shapes in FSI simulations

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

LinkBack Thread Tools Display Modes
Old   September 15, 2009, 09:35
Default Problems with circular shapes in FSI simulations
New Member
Join Date: Sep 2009
Posts: 10
Rep Power: 10
kezman is on a distinguished road

I am working on a impact model of the human head. Skull, Cerebrospinal fluid (CSF) and the human brain.
First I made a very simple model without the brain. Just a simple square filled with the CSF. There is a force applied (starts at 3e-5 seconds ends at 9e-5 seconds ) at the front of the square which represents the impact.
BUT when I model the brain in this square (see it as a circle in a square, around the square is the CSF) the simulation stops always at the timestep when the force will come up.

I tried all different kind of meshes and it didn't help. Maybe the problem is the density of the brain and the fluid, because they are almost simular??

end time = 3e-3
time step = 3e-5

Hope someone can help me.

kezman is offline   Reply With Quote

Old   September 16, 2009, 11:24
Default Meshing oppinion...
Retired from CFD Online
PSYMN's Avatar
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,665
Blog Entries: 1
Rep Power: 39
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
I am no expert in your application, but this doesn't sound like a meshing issue to me (or you wouldn't get to the first time step)...

Ask this question on the solver setup boards, but you will probably need to provide more info about which solver you are using, as well as your bocos, etc.

It may be that you don't have constraints setup correctly.
PSYMN is offline   Reply With Quote


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
Reduce size of Ansys.rst file in FSI simulations? Jorn CFX 6 September 21, 2017 03:00
Problems with circular shapes in FSI simulations kezman CFX 3 October 3, 2012 16:07
Needed Benchmark Problems for FSI Mechstud Main CFD Forum 4 July 26, 2011 12:13
problems simulations enrico STAR-CCM+ 3 August 11, 2009 09:54
how to extend FSI 2D codes to 3D, need advises abouziar Main CFD Forum 1 May 30, 2008 04:08

All times are GMT -4. The time now is 22:10.