Why moments around center of pressure calculated in ansys fluent is not zero?

babri · September 15, 2016, 17:31

hello , I compute location of center of pressure of my geometry in ansys fluent , as you know the moments around this point should be zero because drag and lift forces are acting at this point , but when I compute the moments around center of pressure it is not zero or near zero! so how to find center of pressure ?
some contour of my geometry attached

sbaffini · October 20, 2016, 06:47

This is a quite common engineering misconception.

https://en.wikipedia.org/wiki/Resultant_force

As explained in the "Torque-free resultant" section, not all system of forces have a so called "center of pressure".

The fact that Fluent computes it "in any case" is just marketing.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Periodic flow using Cyclic - comparison with Fluent	nusivares	OpenFOAM Running, Solving & CFD	30	December 12, 2017 06:35
How can I find the pressure at distinct locations on a geometry using ansys fluent	J_student	FLUENT	3	February 29, 2016 17:11
Ansys SIG$ILL error	loth	ANSYS	3	December 24, 2015 06:31
How to combine ANSYS Fluent and Structural analysis?	diwakar	ANSYS	2	June 18, 2015 13:07
Neumann pressure BC and velocity field	Antech	Main CFD Forum	0	April 25, 2006 03:15

October 20, 2016, 06:47		#2
sbaffini Senior Member Paolo Lampitella Join Date: Mar 2009 Location: Italy Posts: 2,192 Blog Entries: 29 Rep Power: 39	This is a quite common engineering misconception. https://en.wikipedia.org/wiki/Resultant_force As explained in the "Torque-free resultant" section, not all system of forces have a so called "center of pressure". The fact that Fluent computes it "in any case" is just marketing.