Mass flux [kg /m^2 /s] as a monitor point

JuPa · April 10, 2015, 06:13

Hi, I have a pressure outlet boundary condition, and some air is passing through it.

I have a target to reach for CFD validation purposes, which is 40 kg /m^2 /s

How do I actually monitor mass flux through my surface in CFX?

If I monitor the expression massFlow@outlet it gives me kg /s and not my needed kg /m^2 /s

There isn't a mass flux variable either.

Is there a simple solution to this please?

Opaque · April 10, 2015, 09:20

You can monitor massFlow@Outlet / area@Outlet, that is the mass flux.

JuPa · April 10, 2015, 09:35

Off course it is! Thank you!

April 10, 2015, 06:13	Mass flux [kg /m^2 /s] as a monitor point	#1
JuPa Senior Member Mr CFD Join Date: Jun 2012 Location: Britain Posts: 361 Rep Power: 15	Hi, I have a pressure outlet boundary condition, and some air is passing through it. I have a target to reach for CFD validation purposes, which is 40 kg /m^2 /s How do I actually monitor mass flux through my surface in CFX? If I monitor the expression massFlow@outlet it gives me kg /s and not my needed kg /m^2 /s There isn't a mass flux variable either. Is there a simple solution to this please?

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April 10, 2015, 09:20		#2
Opaque Senior Member Join Date: Jun 2009 Posts: 1,880 Rep Power: 33	You can monitor massFlow@Outlet / area@Outlet, that is the mass flux.

April 10, 2015, 09:35		#3
JuPa Senior Member Mr CFD Join Date: Jun 2012 Location: Britain Posts: 361 Rep Power: 15	Off course it is! Thank you!