# Mass Averaged Report

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 April 22, 2013, 10:59 Mass Averaged Report #1 New Member   Join Date: Apr 2013 Posts: 2 Rep Power: 0 Hey everybody, first my set-up: i've got a tandem profile, three dimensional with about 5 million cells and i am trying to calculate the pressure loss coefficient in a plane behind the profile. so my problem is, that i need to have a mass-averaged report ( to compare it with values from fluent), but the mass-averaged report apparently just works with volumes in star ccm+, but with the derived parts options i cant build like a cubes just planes or spheres, which arent helping. so my question ist pretty much, is it possible to extrude the meassurement plane, so that i get a volume? or can i for example somehow create a cube in the derived parts? thanks in advance!

 April 22, 2013, 16:09 #2 Super Moderator   Ryne Whitehill Join Date: Aug 2009 Posts: 313 Rep Power: 9 Try using a cell surface instead. Create your derived part cutplane where you want it, then make a cell surface using that cutplane as input. Then use a sum report over the cell surface and sum Mass* and another sum for just mass and divide them rickosgr likes this.

 April 23, 2013, 04:01 #3 New Member   Join Date: Apr 2013 Posts: 2 Rep Power: 0 hey, good idea and with that you brought me to another solution, thats what i did: i definded another userfieldfunction which was Mass*. after that i calculated the mass and my mass* with a surface integral, divide both with each other and i got some comparable values. ( and i think its the same fluent does, when i do a mass averaged surface integral). thank you so much!

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