Symmetry in Fluent: Force-Y not equal to zero?

Edu-R · April 12, 2010, 11:28

Hi all!

I am simulating a 3d rear wing:

And I have a problem or question with the symmetry boundary condition. I put the ZX plane as a Symmetry in Fluent (it is the symmetry plane of the wing), but when I simulate it, the value of Force in the Y axis is not equal to zero. Why? What is the geometry that is simulated? Complete wing or only a half of it?

Thanks!

Regards!

-Edu-

-mAx- · April 13, 2010, 07:30

Only the half of your model is computed. That's why you don't get zero at F-Y.

Edu-R · April 13, 2010, 12:03

Hi -mAx-!

Thanks for your answer!

Regards

-Edu-

DRS · August 9, 2023, 07:06

Which sense has the symmetry, if the model is calculated just half?
This means, you would also have to double the other forces.

April 12, 2010, 11:28	Symmetry in Fluent: Force-Y not equal to zero?	#1
Edu-R Member Edu Join Date: Sep 2009 Posts: 36 Rep Power: 16	Hi all! I am simulating a 3d rear wing: And I have a problem or question with the symmetry boundary condition. I put the ZX plane as a Symmetry in Fluent (it is the symmetry plane of the wing), but when I simulate it, the value of Force in the Y axis is not equal to zero. Why? What is the geometry that is simulated? Complete wing or only a half of it? Thanks! Regards! -Edu-

April 13, 2010, 07:30		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	Only the half of your model is computed. That's why you don't get zero at F-Y. __________________ In memory of my friend Hervé: CFD engineer & freerider

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April 13, 2010, 12:03		#3
Edu-R Member Edu Join Date: Sep 2009 Posts: 36 Rep Power: 16	Hi -mAx-! Thanks for your answer! Regards -Edu-

August 9, 2023, 07:06		#4
DRS New Member DRS Join Date: Jan 2020 Location: Berlin Posts: 2 Rep Power: 0	Which sense has the symmetry, if the model is calculated just half? This means, you would also have to double the other forces.