# dye simulation- dye concentration

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

 April 19, 2006, 10:40 dye simulation- dye concentration #1 mike Guest   Posts: n/a Hi Everybody, I am doing dye injection simulation in water channel with CFX 10. I am using additional variable approach with defining dye as scalar has unit kg/m^3. I am injecting it at a certain point for 1 sec at 0.01 kg/s rate. After this injection I am running it again 20 sec to see how dye moves and to see concentration changes. In CFX post I am creating a point and then a chart of dye vs time at that point. What I am getting is, kg/m^3 vs sec graph. My question is, does this chart show dye concentration at that point with that much of kg in 1 m^3 water? Or to get concentration value, do I have to define anything in CFX pre? Could you please make this point clear? Thanks alot, Mike

 April 19, 2006, 10:54 Re: dye simulation- dye concentration #2 opaque Guest   Posts: n/a Dear Mike, What kind of Additional Variable are you using? Specific, or Volumetric.. For an Specific AV, the ANSYS CFX solver will write 2 fields to the results file: - dye <-- Should be dimensionless - dye.Volumetric <-- Units of concentration For an Volumetric AV, it will write - dye <-- Should be in concentration units kg/m^3 - dye.Specific <-- Should be dimensionless Then, in CFX-Post, you will plot the concentration based on your setup.. Good luck, Opaque

 April 19, 2006, 11:30 Re: dye simulation- dye concentration #3 mike Guest   Posts: n/a Dear Opaque Thank you very much for your help. I used volumetric, thus dye is in kg/m^3 and shows concentration. And this is kg dye concentration per m^3 water (or water + dye) at that point. Am I right? Thanks again, Mike

 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 Apple L S Chan Main CFD Forum 4 October 24, 2011 07:01 sudhirlv STAR-CCM+ 1 September 12, 2010 18:57 akultane CFX 1 November 15, 2009 14:46 Li CFX 7 January 23, 2009 18:54 Apple L S Chan Main CFD Forum 1 December 23, 1998 11:06

All times are GMT -4. The time now is 07:13.