CFD Online Logo CFD Online URL
Home > Forums > CFX

Modeling movement of compressor valve

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

LinkBack Thread Tools Display Modes
Old   October 15, 2008, 02:39
Default Modeling movement of compressor valve
Marco Müller
Posts: n/a

i'm trying to model the movement of compressor valves by CEL with mesh deformation. I use one domain. The valve (see picture) is defined as boundary with specified displacement (CEL). I had no idea how to model the elements for the flow when the valve is openened, so I tried to keep it already open to the beginning of the simulation, and to "expand" the elements in the crack (beginning height 0.2 mm). (expanding factor 25. The beginning aspect ratio of the elements in the crack is 1:5, in the end 5:1) However the end is never reached, because the poor elements surrounding the crack get negative volumes (yet if the valve is opened 1 mm) and solution stops. My question is now, whether there exists a better way to model this problem ("creating elements ex nihilo") or how to realize it with the existing method. Thank You for your replies!!!

Last edited by wyldckat; September 3, 2015 at 16:12. Reason: disabled embedded images
  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
modeling movement of body in fluid Hossein FLUENT 0 November 18, 2008 05:33
modeling flag movement Nader Rahbar CFX 2 September 27, 2006 22:00
modeling flag movement with fluent Nader Rahbar FLUENT 0 September 22, 2006 13:37
May Focus Area: Turbulence Modeling Jonas Larsson CFD-Wiki 0 May 2, 2006 11:48
Modeling Flow/Saturation/Absorption in Fibers Gene Dougherty Main CFD Forum 0 June 6, 2003 14:49

All times are GMT -4. The time now is 16:28.