# droplet absorption diameter

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 LinkBack Thread Tools Display Modes
 March 31, 2010, 12:54 droplet absorption diameter #1 Member   Join Date: Mar 2009 Posts: 34 Rep Power: 10 Sponsored Links Hi, I have a subdomain in which I want to remove particles from the domain. I know that I can use the "Absortion diameter". But now my question: The absorption diameter depends on the gas velocity, is it possible to implement this dependency? I tried to do something like absorption diameter = function of Velocity w, but the following error occurs: "Velocity w is not available for use in this term" Does anyone has an idea? Thanks in advance Claudia
 Sponsored Links

 March 31, 2010, 18:07 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,735 Rep Power: 106 The message is quite clear - you can't make absorption diameter a function of W velocity. Some variables can only be constants or functions of a subset of variables and I think you have found one. If you really need to do this talk to CFX support and they may be able to find a work around for you.

 April 1, 2010, 02:15 #3 New Member   Alex Join Date: Mar 2010 Location: Russia Posts: 19 Rep Power: 9 try to create an expression in cfx pre like absorption diameter = f(velocity w), then use this expression in subdomain. in expression you should use direct difinition, e.g. "massflowave(Velocity W)@inlet*1[s]" it means than your absorption diameter will be equal average velocity w in inlet BC

 April 1, 2010, 07:30 #4 Member   Join Date: Mar 2009 Posts: 34 Rep Power: 10 Thanks, Glenn for your answer. So I have to tell the support about it and I hope they will find a workaround.

 April 2, 2010, 06:14 #5 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 13,735 Rep Power: 106 Yes, that's right. There will be a reason the absorption diameter cannot be set as a function of velocity. If you bypass the check, it may or may not affect your results - so talk to them and try to find out.

 Tags absorption, droplet, subdomain

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post antonietta FLUENT 1 February 23, 2006 07:41 bk Siemens 0 July 12, 2005 06:54 Sam FLUENT 0 June 4, 2005 11:36 David FLUENT 0 August 13, 2004 09:06 Hbet FLUENT 0 June 14, 2001 09:36

 Sponsored Links

All times are GMT -4. The time now is 04:25.

 Contact Us - CFD Online - Top