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

2 Way FSI Problem

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   April 30, 2015, 09:40
Default
  #21
Senior Member
 
Jiri
Join Date: Mar 2014
Posts: 218
Rep Power: 13
Jiricbeng is on a distinguished road
Could you tell how you increased the core number ? Or which pop-up window you mean?
Jiricbeng is offline   Reply With Quote

Old   June 6, 2015, 23:02
Question
  #22
New Member
 
duan derong
Join Date: Oct 2014
Posts: 16
Rep Power: 11
ronggehejiumeizuiguo is on a distinguished road
Quote:
Originally Posted by kmgraju View Post
dear friend
I am doing two way fsi. My structural model has a fixed temperature. I have to send heat to the fluid domain and receive heat from fluid to solid.
similarly, to send forces and displacements.
please clarify the way of setting in the ansys workbench which has been attached for your reference.

Thank you so much for your timely advice

Regards

Govind
dear friend
I also do the fsi with heat transfer. A fixed temperature is set in solid fields. When fsi starts, the flow fields will send forces to solid field and solid field send displacement and temperature to flow fields. Now,I meet some questions. The temperature is not sent to flow fields. Can U help me? How to set in mechanical.
ronggehejiumeizuiguo is offline   Reply With Quote

Old   February 1, 2016, 11:30
Angry Two way FSI- FSI data transfer doesn't work
  #23
New Member
 
andreina
Join Date: Oct 2015
Posts: 6
Rep Power: 10
andreina is on a distinguished road
Hi everybody,
I'm implementing the tutorial Two way FSI using ANSYS Fluent Part-1 in https://www.youtube.com/watch?v=DGPmyGFnzhA but I'm having some trouble during the data transfer between the fluid and solid domain, it simply doesn't work and doesn't apear any error (image attached). I already tried using a constant velocity instead of the udf function but it doesn't work. Does anyone have any idea what the problem may be?
Thanks in advance
andreina is offline   Reply With Quote

Old   July 20, 2016, 17:59
Default compressible fluid flow in a fully enclosed volume
  #24
Member
 
David
Join Date: Aug 2013
Posts: 72
Rep Power: 12
mrkmrk is on a distinguished road
Hi All,
I'm modelling a compressible fluid flow in a fully enclosed volume using ANSYS CFX two way FSI method. The fluid is surrounded by a deformable membrane.

I want to study on the stresses produced inside the membrane thickness by external forces.

The problem is- in the first time step a pressure spike is generated by the fluid domain, when this pressure is transferred to the structure domain, it can't bear such a pressure magnitude and the solution diverges.

I know this problem should be initialized by a steady state 2 way FSI solution, but due to the constraint used in the structural part the structural solution cannot be converged in a steady state way. Therefore I initialized the problem using a transient 2 way FSI solution. I could achieve this solution using a time step size of 0.1s that is very bigger than the maximum time step size needed for my problem (0.001s).

However this initialization could not solve my problem and the same problem occurs for next time step (time= 0.101s) again.

I will be very thankful if anyone can help me to solve this problem.

Last edited by mrkmrk; July 21, 2016 at 05:01.
mrkmrk is offline   Reply With Quote

Reply


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
FSI nonlinear problem mead4454 CFX 0 March 1, 2010 05:24
what's rhe problem when CFX solve the FSI justdo CFX 2 February 26, 2010 02:58
FSI MODELING PROBLEM (pinball)!!! smn CFX 1 September 16, 2009 00:33
Negative volume problem in Two-way FSI coupling fred CFX 3 August 16, 2006 10:03
Is this problem well posed? Thomas P. Abraham Main CFD Forum 5 September 8, 1999 14:52


All times are GMT -4. The time now is 18:02.