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

How to model a mechanical valve in a pipe?

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 4, 2017, 05:05
Default How to model a mechanical valve in a pipe?
  #1
New Member
 
hoyin
Join Date: Aug 2017
Posts: 1
Rep Power: 0
hoyin is on a distinguished road
Dear all,

I am trying to model a mechanical valve in a cylindrical pipe using 2-way FSI technique. Water is pumping from one end to the other end using pulse waveform. The valve is used to prevent back flow and is initially CLOSED. You can imagine the problem is to model a valve inside a blood vessel.

The problem I have now is that since the valve is closed at the beginning, the pipe is divided into 2 separate "fluid chambers" without "fluid" connection (i.e., the fluid before passing through and after passed through the valve). Here is what I did:

"I created named the surfaces on both sides of the valve. These 2 surfaces are used to couple the forces calculated from Fluent solver in System Coupling(SC). Therefore, I had 4 Data Transfers in SC: two Data Transfers (i.e., displacement and force) per each surface"

ANSYS returned error like Update-Dynamic-Mesh failed, Negative cell volume detected. I was thinking if it is becasue ANSYS may not know the 2 fluid chambers are connected if the valve is opened. May I ask expertise here for help?

I have tried if the valve is initially opened, the model works. In that model, I have one FSI interface only since both sides of the valve can consider as one surface. The meshing settings are similar in both case. So,I suspect the problem is due to separation 2 fluid chambers.


Thank you so much first !
hoyin is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
how to model the heat transfer of pipe located in the soil reza67 FLUENT 5 October 19, 2014 14:33
How to model or/and increase entrance loss in perforated pipe ? Tanjina FLUENT 0 April 17, 2014 16:35
pipe model numerical integration datle Main CFD Forum 11 November 26, 2013 12:26
Pipe with valve Giordano Bruno FLUENT 0 January 13, 2009 06:16
cfd model of a leaking valve?? stephen rosen Main CFD Forum 2 May 10, 1999 11:44


All times are GMT -4. The time now is 09:26.