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Coordinate system change

Posted 30 mag 2012, 05:42 GMT-4 Heat Transfer & Phase Change, Geometry, Results & Visualization Version 4.2 2 Replies

Mika Maaspuro
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Hello,


I came to situation where I should calculate some integrals rather in cylindrical coordinate system
than in normal orthogonal system. However my CAD model has been drawn in normal coordinate
system. Are there any option to change coordinate system afterwards ?
2 Replies Last Post 19 mar 2014, 10:56 GMT-4
Magnus Hedlund
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Posted: 1 decade ago 30 mag 2012, 07:26 GMT-4
Yep!

Model->Definitions (right click) -> Coordinate systems -> cylindrical coordinate system

Can be used for definitions of boundary conditions etc.

For results, I'd recommend you to create subsets of your solution dataset.

Results->Data Sets (right click) -> Parameterized surface (3D)

For a cylindrical plane, the following would do:
first parameter name: my_z
minimum 0
maximum 15
second parameter name: my_theta
minimum 0
maximum 2*pi
expressions
x: 10*cos(my_theta)
y: 10*sin(my_theta)
z: my_z

Now you have an additional dataset on which you can perform surface integrations or plot stuff with.

Good luck,
Magnus
Yep! Model->Definitions (right click) -> Coordinate systems -> cylindrical coordinate system Can be used for definitions of boundary conditions etc. For results, I'd recommend you to create subsets of your solution dataset. Results->Data Sets (right click) -> Parameterized surface (3D) For a cylindrical plane, the following would do: first parameter name: my_z minimum 0 maximum 15 second parameter name: my_theta minimum 0 maximum 2*pi expressions x: 10*cos(my_theta) y: 10*sin(my_theta) z: my_z Now you have an additional dataset on which you can perform surface integrations or plot stuff with. Good luck, Magnus
Elizabeth Fisher
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Posted: 1 decade ago 19 mar 2014, 10:56 GMT-4
Hi -- I have a similar question. I have a fairly complicated model in 1-D axisymmetric geometry. The geometry of my model is simple, but the physics is complicated (lots of chemical source terms). Is there a way to convert the model to 1-D cartesian (or some other system)? It would be pretty easy to redefine the geometry, but entering all the physics would be time-consuming.
Hi -- I have a similar question. I have a fairly complicated model in 1-D axisymmetric geometry. The geometry of my model is simple, but the physics is complicated (lots of chemical source terms). Is there a way to convert the model to 1-D cartesian (or some other system)? It would be pretty easy to redefine the geometry, but entering all the physics would be time-consuming.

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