CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   center of gravity orientation (http://www.cfd-online.com/Forums/fluent/98082-center-gravity-orientation.html)

wujinlao5 March 2, 2012 11:49

center of gravity orientation
 
hi,everyone,
fluent dynamic mesh options
does anyone knows what "center of gravity orientation" refers to?
the center of gravity location is just a point ,does it have to obtain an "orientation"?

grayback87 March 2, 2012 13:46

Hi, I think you must think in the 3 axis of your model, centered on the center of gravity.
X-axis, the orientation is the angle that the axis has.

I don't let the same value (0) when your mesh is moving the orientation changes.

wujinlao5 March 3, 2012 02:56

Quote:

Originally Posted by grayback87 (Post 347341)
Hi, I think you must think in the 3 axis of your model, centered on the center of gravity.
X-axis, the orientation is the angle that the axis has.

I don't let the same value (0) when your mesh is moving the orientation changes.

you mean it is relevant to relationships between local coordinate system and the global coordinate system?

anyone could make the conception clear?

xrs333 March 3, 2012 10:31

在惯性坐标系中区域相对于重心的方向(Theta_X, Theta_Y, Theta_Z)。多数情况下,这个方向为初始参考方向,用于追踪对象的当前方向。使用6自由度求解器时,这个方向用于计算变形矩阵。

sriny1512 June 27, 2014 08:53

Hi Everyone,

I am stuck with this point on how to find the Center of Gravity orientation when defining dynamic zones. I got the CG x, y and z values using "mass properties" command in "analysis tools" in Ansys, but not able to get the CG orientation value. Please complete this thread by specifying the answer.


All times are GMT -4. The time now is 14:09.