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

cross-shaped mixer

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 16, 2012, 09:03
Default cross-shaped mixer
  #1
Senior Member
 
christine
Join Date: Jul 2009
Location: europe
Posts: 121
Rep Power: 7
yorelchr is on a distinguished road
hello everyone,

I am doing simulations on a 3D cross-shaped micromixers.
In order to study the mixing quality of the cross-shaped micormixer, I have to use 2 liquids. Both with same properties of water at 20C. One introduced in inlet1, the other in inlet 2.
So in inlet 1 I can put liquid water.
In inlet 2, how should I proceed? all I have read on internet is confusing me.
Should I create a second fluid called "dye", for example: I take liquid water in the database, change the name and cancel the chemical formula. Then?
Thank you for any help. It is really urgent !

Last question: I must use pressure outlet with atmsopheric pression. As in Fluent, the operating pressure is set to 101325 Pa, do I have to write it again in the oulet for the Gauge pressure? I don't really understand that.
thanks for any help !!!
yorelchr is offline   Reply With Quote

Old   December 16, 2012, 12:01
Default injections, particle tracking, DPM
  #2
Senior Member
 
christine
Join Date: Jul 2009
Location: europe
Posts: 121
Rep Power: 7
yorelchr is on a distinguished road
Quote:
Originally Posted by yorelchr View Post
hello everyone,

I am doing simulations on a 3D cross-shaped micromixers.
In order to study the mixing quality of the cross-shaped micormixer, I have to use 2 liquids. Both with same properties of water at 20C. One introduced in inlet1, the other in inlet 2.
So in inlet 1 I can put liquid water.
In inlet 2, how should I proceed? all I have read on internet is confusing me.
Should I create a second fluid called "dye", for example: I take liquid water in the database, change the name and cancel the chemical formula. Then?
Thank you for any help. It is really urgent !

Last question: I must use pressure outlet with atmsopheric pression. As in Fluent, the operating pressure is set to 101325 Pa, do I have to write it again in the oulet for the Gauge pressure? I don't really understand that.
thanks for any help !!!

I am trying to do as this:
Define/Injection/create/
- injection type : surface - from inlet 2
- inert
- material : anthracite (the default one) : how should I choose something that would have same properties as water?
- diameter distribution : uniform
- point properties : x,y and z-vel are set by default to 0, should I put the velocity I put for the water to enter?
diameter : 0.001
temp : 300K

Then I go to Discrete Phase Model, max number of steps to 500 and that's all?
Then I launch calculations?
I really need your help !!!!!
yorelchr is offline   Reply With Quote

Old   December 16, 2012, 13:40
Default
  #3
Senior Member
 
christine
Join Date: Jul 2009
Location: europe
Posts: 121
Rep Power: 7
yorelchr is on a distinguished road
Quote:
Originally Posted by yorelchr View Post
I am trying to do as this:
Define/Injection/create/
- injection type : surface - from inlet 2
- inert
- material : anthracite (the default one) : how should I choose something that would have same properties as water?
- diameter distribution : uniform
- point properties : x,y and z-vel are set by default to 0, should I put the velocity I put for the water to enter?
diameter : 0.001
temp : 300K

Then I go to Discrete Phase Model, max number of steps to 500 and that's all?
Then I launch calculations?
I really need your help !!!!!

I have modified a little what I have done before. Using particle tracking I have createt a particle named "dye" with same properties of water. But when I run calculations I have :
DPM Iteration ....
number tracked = 361, escaped = 0, aborted = 0, trapped = 0, evaporated = 0, incomplete = 361, incomplete_parallel = 0
Parallel particle tracking concurrency: 50%


Is it normal?
How can I have the concentration of the dye after calculations? nothing in the menu for that, just things as "residence time etc..." ...
please !!!! any help would be ok, I don't even know if what I'm doing has any sense and it's impossible to find anything clear on the net !!!!

I just need to find the way to determine the concentration of a "dye" that would be injected from one of the 2 inlets ......
yorelchr is offline   Reply With Quote

Reply

Tags
particle tracking

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 out of an odd shaped tank halfrhovsquared FLOW-3D 8 March 13, 2012 15:48
Jet cross flow in a cylindrical mesh shackman287 OpenFOAM Running, Solving & CFD 1 March 13, 2012 03:03
Modelling the cross aisle direction of a steel selective rack for model analysis m8rix ANSYS 0 September 20, 2011 10:28
Cross Product in Vorticity Confinement Kastenfrosch Main CFD Forum 6 July 30, 2010 06:45
Simulating a static mixer in Fluent Novice FLUENT 1 January 26, 2009 13:09


All times are GMT -4. The time now is 06:42.