CFD Online Logo CFD Online URL
Home > Forums > CFX

Bi-Stable Feedback Flow diverter-2D/3D FLOTRAN

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

LinkBack Thread Tools Display Modes
Old   February 10, 2006, 00:09
Default Bi-Stable Feedback Flow diverter-2D/3D FLOTRAN
Bashkim Veizaj
Posts: n/a
I am simulating a bi-stable flow diverter that works based on Coanda effect. I am having two problems:

1. The 2D transient analysis does the same thing as steady state i.e. runs in time until the flow fully diverts in one side and then does not divert to the other side, even though the flow in the feedback loop looks good enough.

2. The same thing simulated in 3D does not give the same results as 2D(velocities are much lower) and the vector plot values does not match the VSUM values.

BC ARE: Inlet velocity: 1000 in/sec, outlet pressure 1000 psi in both legs. Assumed inlet flow is 2 bbl /min.

How can I make the transient work? How much can the mesh assymetry effect the results? The purpose of the simulation is to determine the geometry that will ensure flow divertion.

Any assistance is appreciated.

  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
Flow analysis in Ansys Flotran paritc ANSYS 0 March 26, 2010 00:51
Help: Poiseulle flow benchmariking Mohammad Kermani Main CFD Forum 1 November 12, 1999 17:15
Flow visualization vs. Calculated flow patterns Francisco Saldarriaga Main CFD Forum 1 August 2, 1999 23:18
Question on 3D potential flow Adrin Gharakhani Main CFD Forum 13 June 21, 1999 05:18
computation about flow around a yawed cone Tylor Xie Main CFD Forum 0 June 9, 1999 07:33

All times are GMT -4. The time now is 13:57.