CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

variable composition mixture

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 14, 2010, 02:18
Default variable composition mixture
  #1
New Member
 
ranjith
Join Date: Dec 2009
Posts: 19
Rep Power: 16
ranjith is on a distinguished road
Hi,
I am simulating mixing of two fluids of different viscosity and different density. For this I have defined a variable composition mixture. The domain is initially filled with fluid A( by defining mass fraction of A as 1 in the mixture initially). The fluid entering the domain is entirely composed of fluid B( by defining mass fraction of B as 1 at the inlet). Bouyancy is switched on to capture the hydrostatic effects. A transient simulation was done with total time equal to the time taken to travese the domain(at a fixed flow rate)
The problem is that there is no flow at all. Instead a small portion of the fluid at the outlet comes in. I dont know why this happens. Would greatly appreciate any help

Ranjith
ranjith is offline   Reply With Quote

Old   October 14, 2010, 22:10
Default
  #2
Senior Member
 
Michael P. Owen
Join Date: Mar 2009
Posts: 196
Rep Power: 17
michael_owen is on a distinguished road
Did you initialize the hydrostatic pressure?
michael_owen is offline   Reply With Quote

Old   October 15, 2010, 00:30
Default
  #3
New Member
 
ranjith
Join Date: Dec 2009
Posts: 19
Rep Power: 16
ranjith is on a distinguished road
No, where can I do it
ranjith is offline   Reply With Quote

Old   October 15, 2010, 10:50
Default
  #4
Senior Member
 
Michael P. Owen
Join Date: Mar 2009
Posts: 196
Rep Power: 17
michael_owen is on a distinguished road
Domain Initialization. Read the tutorials on free surface flows to see how to initialize a hydrostatic pressure.
michael_owen is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
variable composition mixture properties Neser25 CFX 6 August 17, 2020 15:19
Variable Composition Mixture vs. Fluid Pair Abby CFX 0 February 18, 2009 12:00
error in COMSOL:'ERROR:6164 Duplicate Variable' bhushas COMSOL 1 May 30, 2008 05:35
Variable composition mixture .vs. reacting mixture Ting Wen CFX 0 January 7, 2008 07:04
Replace periodic by inlet-outlet pair lego CFX 3 November 5, 2002 21:09


All times are GMT -4. The time now is 07:44.