Calculation of mass flow rate through a plane

titio · July 2, 2010, 14:00

Dear Foamers,

Is there any way of calculating the mass flow rate through a given plane of the mesh that is not a patch boundary. I found in the forum the calcMassFlow utility, but I have some doubts if I can use for a non patch plane.

My idea was to use the simpleFunctionObjects in the controlDict file, but I do not understand what function should I use.

Also, is it possible to calculate two values of flow rate and then calculate the value of a parameter, all defined in the controlDict file? I believe this is better done in the code, right?

Anyone can help me out here?

António Martins

robingilbert · September 27, 2010, 16:55

Hi titio,

Did you figure out how to calculate the mass flow-rate through a non patch plane?

robingilbert · September 28, 2010, 00:28

I just now figured it out. if anybody is interested, they can use swak4Foam by
Bernhard Gschaider. here is the link:
it has a tutorial for angled duct which shows how it is done.

http://openfoamwiki.net/index.php/Contrib/swak4Foam

July 2, 2010, 14:00	Calculation of mass flow rate through a plane	#1
titio Senior Member Antonio Martins Join Date: Mar 2009 Location: Porto, Porto, Portugal Posts: 112 Rep Power: 17	Dear Foamers, Is there any way of calculating the mass flow rate through a given plane of the mesh that is not a patch boundary. I found in the forum the calcMassFlow utility, but I have some doubts if I can use for a non patch plane. My idea was to use the simpleFunctionObjects in the controlDict file, but I do not understand what function should I use. Also, is it possible to calculate two values of flow rate and then calculate the value of a parameter, all defined in the controlDict file? I believe this is better done in the code, right? Anyone can help me out here? António Martins

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September 27, 2010, 16:55		#2
robingilbert Member Robin Gilbert Join Date: Jan 2010 Posts: 66 Rep Power: 16	Hi titio, Did you figure out how to calculate the mass flow-rate through a non patch plane?

September 28, 2010, 00:28		#3
robingilbert Member Robin Gilbert Join Date: Jan 2010 Posts: 66 Rep Power: 16	I just now figured it out. if anybody is interested, they can use swak4Foam by Bernhard Gschaider. here is the link: it has a tutorial for angled duct which shows how it is done. http://openfoamwiki.net/index.php/Contrib/swak4Foam