center of gravity orientation

wujinlao5 · March 2, 2012, 10:49

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, 12:46

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, 01:56

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?

xrs333 · March 3, 2012, 09:31

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.

March 2, 2012, 10:49	center of gravity orientation	#1
wujinlao5 New Member lida Join Date: Feb 2012 Posts: 4 Rep Power: 14	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"?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Ok to increase gravity gradually from 0 to 9.82?	Admo	FLUENT	3	February 23, 2012 10:43
UDF fails to model 9.81m/s^2 gravity	jpo	Fluent UDF and Scheme Programming	2	January 24, 2012 18:15
RE: Applying forces / Center of Gravity in CFX	Janusz	CFX	1	November 16, 2008 19:37
Multicomponent fluid	Andrea	CFX	2	October 11, 2004 05:12
On gravity modelling...	Drona	CFX	7	November 22, 2001 10:28

March 2, 2012, 12:46		#2
grayback87 New Member Join Date: Dec 2011 Location: Spain Posts: 25 Rep Power: 14	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, 09:31		#4
xrs333 Senior Member xrs333 Join Date: Aug 2010 Posts: 125 Rep Power: 16	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
sriny1512 New Member sreenivas devaraju Join Date: Jun 2014 Posts: 7 Rep Power: 11	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.