Post-process for mass flow rate

wei · May 13, 2009, 05:29

I run an engine simulation and am able to present velocity and static pressure at desire crank angle using contour plot or vector plot.

For mass flow rate, how can I extract the information and post-process it?

p/s some more information added

Later, I try

getc flux

However, the output printed "*Error - all 6 fluxes are not on file". What is that means?

A_Lyaskin · May 18, 2009, 05:19

Take a look at INTEGRATE command - may be that's what you need?

vishyaroon · May 18, 2009, 09:45

INTEGRATE is a good option as Anton mentions. I;m not sure of what you are looking for in particular, but also check SUMMARY command.

wei · May 19, 2009, 12:00

thanks for your comments.

I try to check the mass flow rate of a surface. I goto Plot > Flux Sum > Pick Cells to select four cells. The output prints:

For 4 faces: area = 0.40E-01 flux= -0.821894E-04
total cumulative area (absolute) = 0.7E-01
total cumulative area (scaled) = 0.7E-07
total cumulative fllux = -0.143841E-03

If the unit of dimension in my case is milimeter,
1) What units are above numbers?
2) What is the differences of 'area', 'total cumulative area (absolute) ' and 'total cumulative area (scaled)' ?
3) What is the differences of 'flux', 'total cumulative flux' ?

vishyaroon · May 19, 2009, 12:43

The total area (Scaled) is in mm^2. You must have scaled (STAR CD does this when you choose the mm option) before writing out the geometry file. This is the scaled area.

May 13, 2009, 05:29	Post-process for mass flow rate	#1
wei New Member wei Join Date: Apr 2009 Posts: 17 Rep Power: 17	I run an engine simulation and am able to present velocity and static pressure at desire crank angle using contour plot or vector plot. For mass flow rate, how can I extract the information and post-process it? p/s some more information added Later, I try getc flux However, the output printed "Error - all 6 fluxes are not on file". What is that means? Last edited by wei; May 13, 2009 at 10:29.*

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Mass flow rate	eddie	FLUENT	15	July 19, 2017 09:31
Target Mass Flow Rate	Nitin	FLUENT	9	June 17, 2017 10:30
Max.allowable flow rate in a packed bed	Mamata	FLUENT	3	May 29, 2017 12:33
negative global mass flow rate	Gimli	FLUENT	0	April 21, 2006 07:17
Inviscid Drag at subsonic, subcritical Mach #	Axel Rohde	Main CFD Forum	1	November 19, 2001 12:19

May 18, 2009, 05:19		#2
A_Lyaskin Member Anton Lyaskin Join Date: Mar 2009 Location: Samara, Russia Posts: 66 Rep Power: 17	Take a look at INTEGRATE command - may be that's what you need?

May 18, 2009, 09:45		#3
vishyaroon Senior Member Aroon Join Date: Apr 2009 Location: Racine WI Posts: 148 Rep Power: 17	INTEGRATE is a good option as Anton mentions. I;m not sure of what you are looking for in particular, but also check SUMMARY command.

May 19, 2009, 12:00		#4
wei New Member wei Join Date: Apr 2009 Posts: 17 Rep Power: 17	thanks for your comments. I try to check the mass flow rate of a surface. I goto Plot > Flux Sum > Pick Cells to select four cells. The output prints: For 4 faces: area = 0.40E-01 flux= -0.821894E-04 total cumulative area (absolute) = 0.7E-01 total cumulative area (scaled) = 0.7E-07 total cumulative fllux = -0.143841E-03 If the unit of dimension in my case is milimeter, 1) What units are above numbers? 2) What is the differences of 'area', 'total cumulative area (absolute) ' and 'total cumulative area (scaled)' ? 3) What is the differences of 'flux', 'total cumulative flux' ?

May 19, 2009, 12:43		#5
vishyaroon Senior Member Aroon Join Date: Apr 2009 Location: Racine WI Posts: 148 Rep Power: 17	The total area (Scaled) is in mm^2. You must have scaled (STAR CD does this when you choose the mm option) before writing out the geometry file. This is the scaled area.