Mass flow rate outlet

Saima · January 31, 2017, 18:49

Hello Folks,

How to impose mass flow rate outlet in Star-CCM+?

I have seen under pressure outlet there is an option on target mass flow rate.

But if we impose it, it also require P02 in this case it always tries to attempt P02.

Kindly guide me for that

Thank you,

Fiedde1887 · February 1, 2017, 04:03

You can use a MF-inlet with a inversed value.

me3840 · February 3, 2017, 15:07

You have to be careful with the mass flow inlet with a negative value, since it imposes a velocity field upstream of the condition and can cause poor convergence.

The flow split-outlet has an option for a specified mass flux if you have a constant-density flow I think.

Other than that you have to use the mass flow inlet with a negative number, but I recommend you coarsen the mesh upstream of it to try and make the incoming field more uniform.

January 31, 2017, 18:49	Mass flow rate outlet	#1
Saima Senior Member Saima Join Date: Apr 2009 Location: Canada Posts: 185 Rep Power: 16	Hello Folks, How to impose mass flow rate outlet in Star-CCM+? I have seen under pressure outlet there is an option on target mass flow rate. But if we impose it, it also require P02 in this case it always tries to attempt P02. Kindly guide me for that Thank you, __________________ Best Redards, Saima

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Plotting mass flow rate at outlet for transient simulation	Rakib	Fluent Multiphase	4	September 5, 2015 23:46
Compressible flow, no data at the outlet	mireis	FLUENT	6	September 3, 2015 02:10
mass flow rate...	sanjar	OpenFOAM Running, Solving & CFD	1	December 2, 2013 00:09
How Other Conditions Impact Mass Flow Rate Outlet	andy P.	Main CFD Forum	2	February 9, 2007 10:41
Mass flow rate at outlet	Leon	FLUENT	7	October 22, 2004 07:36

February 1, 2017, 04:03		#2
Fiedde1887 Member Nils Hennig Join Date: Apr 2015 Posts: 44 Rep Power: 11	You can use a MF-inlet with a inversed value.

February 3, 2017, 15:07		#3
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	You have to be careful with the mass flow inlet with a negative value, since it imposes a velocity field upstream of the condition and can cause poor convergence. The flow split-outlet has an option for a specified mass flux if you have a constant-density flow I think. Other than that you have to use the mass flow inlet with a negative number, but I recommend you coarsen the mesh upstream of it to try and make the incoming field more uniform.