Mean Mass Fraction of Co

Gespenster · September 8, 2015, 19:36

Hello everybody,
I am trying to simulate sandia D flame model with Ansys 15, but i am getting mean mass fraction of co as 0,
But it gives the true value about mass fraction,
How Fluent calculates the mean mass fraction from the mass fraction,
Which default values can be wrong?

LuckyTran · September 8, 2015, 21:36

So you have an unsteady simulation and want to know the mean fraction? Did you turn on data sampling for time statistics?

Gespenster · September 8, 2015, 22:20

Actually, according the tutorial it has to be a steady simulation. I added a monitor to the outlet(I defined a point very close to the outlet and use it for monitoring) to plot "Iteration vs Mean co Mass fraction" graph. At the first iteration it gives a different value from the 0.But at the all other iterations it gives 0.

September 8, 2015, 19:36	Mean Mass Fraction of Co	#1
Gespenster New Member Oktay Firat Ural Join Date: Sep 2015 Posts: 4 Rep Power: 11	Hello everybody, I am trying to simulate sandia D flame model with Ansys 15, but i am getting mean mass fraction of co as 0, But it gives the true value about mass fraction, How Fluent calculates the mean mass fraction from the mass fraction, Which default values can be wrong?

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September 8, 2015, 21:36		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,751 Rep Power: 66	So you have an unsteady simulation and want to know the mean fraction? Did you turn on data sampling for time statistics?

September 8, 2015, 22:20		#3
Gespenster New Member Oktay Firat Ural Join Date: Sep 2015 Posts: 4 Rep Power: 11	Actually, according the tutorial it has to be a steady simulation. I added a monitor to the outlet(I defined a point very close to the outlet and use it for monitoring) to plot "Iteration vs Mean co Mass fraction" graph. At the first iteration it gives a different value from the 0.But at the all other iterations it gives 0.