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.*

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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.