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

mass flow of inlet and outlet is not equal

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 22, 2014, 03:52
Unhappy mass flow of inlet and outlet is not equal
  #1
New Member
 
Join Date: Feb 2014
Posts: 21
Rep Power: 3
datouguaiguai is on a distinguished road
a simulation, the force result looks convergence, but de mass flow of inlet is not the same as the one of outlet. why? how should i deal with the issue?
Attached Images
File Type: jpg 无标题.jpg (15.5 KB, 25 views)
datouguaiguai is offline   Reply With Quote

Old   March 22, 2014, 20:09
Default
  #2
Senior Member
 
Join Date: Nov 2010
Posts: 418
Rep Power: 8
me3840 is on a distinguished road
Is the mass just not converged yet?
me3840 is offline   Reply With Quote

Old   March 25, 2014, 10:29
Default
  #3
Senior Member
 
Ping
Join Date: Mar 2009
Posts: 223
Rep Power: 9
ping is on a distinguished road
looks like you are doing a marine vof case on the wigly hull. you need to be careful when measuring mass flows of water and air in and out of such cases when motion is involved etc. i'd be create a monitor and plot of this to look at the history and when such models are well setup the mass flows do converge but also cycle around zero due to motion and waves. most marine users never do such a report and instead look and convergence of forces, moments and motions.
ping is offline   Reply With Quote

Reply

Tags
mass flow

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
Mass flow inlet and pressure outlet issue nikhil FLUENT 5 December 11, 2013 13:30
mass flow inlet and pressure outlet with target mass flow rate Zigainer FLUENT 10 January 5, 2013 22:51
Species mass flow inlet lorenz FLUENT 3 March 15, 2012 08:26
Net mass flow inlet vs outlet Nigui28 FLUENT 1 August 12, 2011 10:09
Compressible flow, no data at the outlet mireis FLUENT 1 July 28, 2010 05:22


All times are GMT -4. The time now is 20:59.