how does Fluent calculate the pressure and viscous force vector?

Ralf Schmidt · March 21, 2010, 14:25

Hi!

can someone explain me, how does Fluent calculate the pressure and viscous force vector?

In the handbook in section "29.3.1 Computing Forces, Moments, and the Center of Pressure" it is only described, that the total force component is computed using the pressure and viscous force vector.

But, hoe are they calculated?? I didn't found anything about that in the manual...

Thank you!
Ralf

P.S.: I found following: "net pressure force vector, acting on a wall zone, is computed as the vector sum of the individual force vectors for each cell face"

But.. how to calculate the individual force vectors??

Pasha_l · May 17, 2010, 15:29

Hallo, haben Sie was weiter entdeckt zur Berechnung der viskosen Kräften?

Ralf Schmidt · May 17, 2010, 15:49

not so far ... i am looking now in a totally other direction...

March 21, 2010, 14:25	how does Fluent calculate the pressure and viscous force vector?	#1
Ralf Schmidt Member Ralf Schmidt Join Date: Mar 2009 Location: Austria Posts: 67 Rep Power: 17	Hi! can someone explain me, how does Fluent calculate the pressure and viscous force vector? In the handbook in section "29.3.1 Computing Forces, Moments, and the Center of Pressure" it is only described, that the total force component is computed using the pressure and viscous force vector. But, hoe are they calculated?? I didn't found anything about that in the manual... Thank you! Ralf P.S.: I found following: "net pressure force vector, acting on a wall zone, is computed as the vector sum of the individual force vectors for each cell face" But.. how to calculate the individual force vectors?? __________________ CFD - nothing but Colourful Fluid Dynamics

May 17, 2010, 15:49		#3
Ralf Schmidt Member Ralf Schmidt Join Date: Mar 2009 Location: Austria Posts: 67 Rep Power: 17	not so far ... i am looking now in a totally other direction... __________________ CFD - nothing but Colourful Fluid Dynamics

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May 17, 2010, 15:29		#2
Pasha_l New Member Join Date: Mar 2010 Location: Germany Posts: 2 Rep Power: 0	Hallo, haben Sie was weiter entdeckt zur Berechnung der viskosen Kräften?