Defining coordinate system using parameters in CFX-Pre

mbranag · April 12, 2018, 16:39

Hi,
I am trying to run my simulation in a rotating reference frame. I want the reference frame to be offset from the global coordinate system in the global x-y frame. When I add a coordinate system I can only enter numerical values into the defining points. Is there a way to add this using parameters?
Thanks

Gert-Jan · April 12, 2018, 16:52

Yes, this is possible. For example, you can create three expressions. Lets say a,b &c

a=1[m]
b=1[m]
c=a+b

Then, in Pre, right click on your coordinate frame and select "Edit in Command Editor".
This opens the definition of your coordinate frame in text format.
Now you can replace numbers with your expressions a,b&c

Make sure that your expressions always have the dimension [m].

mbranag · May 4, 2018, 09:14

Thanks! That solved the issue.

April 12, 2018, 16:39	Defining coordinate system using parameters in CFX-Pre	#1
mbranag New Member Michael Join Date: May 2017 Posts: 12 Rep Power: 9	Hi, I am trying to run my simulation in a rotating reference frame. I want the reference frame to be offset from the global coordinate system in the global x-y frame. When I add a coordinate system I can only enter numerical values into the defining points. Is there a way to add this using parameters? Thanks

May 4, 2018, 09:14	Thanks	#3
mbranag New Member Michael Join Date: May 2017 Posts: 12 Rep Power: 9	Thanks! That solved the issue.

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April 12, 2018, 16:52		#2
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,885 Rep Power: 27	Yes, this is possible. For example, you can create three expressions. Lets say a,b &c a=1[m] b=1[m] c=a+b Then, in Pre, right click on your coordinate frame and select "Edit in Command Editor". This opens the definition of your coordinate frame in text format. Now you can replace numbers with your expressions a,b&c Make sure that your expressions always have the dimension [m].