CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

Total mass flow/flux through a plane problem

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

LinkBack Thread Tools Search this Thread Display Modes
Old   December 15, 2010, 20:51
Default Total mass flow/flux through a plane problem
New Member
Nick Walters
Join Date: Dec 2010
Posts: 1
Rep Power: 0
nwalters is on a distinguished road
I'm using fluent 12.1.4 and I'm having a problem getting the mass flow through a plane. In my model I have a plane which has mass flows through it in two directions. When I set up the surface integral on the plane it will give me the net mass flow as very close to zero because of continuity but I cannot determine the total flow or flux that is occuring. What is the best way to approach this problem.

A picture of the problem:

The plane i need for the mass flow (bulk) or flux is in red. (There is no pressure outlet at the bottom of the hopper so flow is forced to come back up through the plane).
nwalters is offline   Reply With Quote

Old   December 18, 2010, 12:23
New Member
Sowmya K
Join Date: Nov 2009
Posts: 22
Rep Power: 16
skris2009 is on a distinguished road
You can try this:
- Write out the velocity values on the plane (through export option in fluent)
- Open the file in Excel and perform a surface integral yourself. (separately for the positive and negative values)
- Use the average velocity values (both +ve and -ve) to compute two mass fluxes.

Or if you just want to know which direction flow is occurring, then just the net positive or negative velocity should suffice (if your flow is incompressible).

Hope this helps.
skris2009 is offline   Reply With Quote


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
DPM mass problem Henrik Ström FLUENT 9 May 20, 2016 11:00
how to get total mass of air through a surface yubaibai88 FLUENT 0 June 2, 2010 08:14
concentration, total mass?? yee wan FLUENT 0 February 24, 2003 21:34
Residual Problem -Mass Imbalance Jie FLUENT 0 February 19, 2002 10:49
total mass flux correction for compressible fluid? Francesco Di Maio Main CFD Forum 0 August 21, 2000 04:23

All times are GMT -4. The time now is 09:48.