# center of gravity orientation

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 March 2, 2012, 11:49 center of gravity orientation #1 New Member   lida Join Date: Feb 2012 Posts: 4 Rep Power: 5 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"?

 March 2, 2012, 13:46 #2 New Member   Join Date: Dec 2011 Location: Spain Posts: 24 Rep Power: 5 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.

March 3, 2012, 02:56
#3
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lida
Join Date: Feb 2012
Posts: 4
Rep Power: 5
Quote:
 Originally Posted by grayback87 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?

 March 3, 2012, 10:31 #4 Senior Member   xrs333 Join Date: Aug 2010 Posts: 125 Rep Power: 8 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。

 June 27, 2014, 08:53 #5 New Member   sreenivas devaraju Join Date: Jun 2014 Posts: 4 Rep Power: 3 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.

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