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Using functions in geometry parameters

Posted 15 giu 2016, 08:47 GMT-4 Parameters, Variables, & Functions 1 Reply

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Hi, I have defined functions (either globally, or in component) which I then wanted to use in geometry parameters like position. Comsol sais 'unknown function or operator'. How can I do this? A simplified example is attached.
Thank you
Daniel
1 Reply Last Post 15 giu 2016, 10:26 GMT-4
Henrik Sönnerlind COMSOL Employee

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Posted: 8 years ago 15 giu 2016, 10:26 GMT-4
Hi,

The geometry can only depend on parameters, not on functions. But parameters can be very general expressions of other parameters.

The difference between a parameter and a function is that the parameter is fixed within a certain study step, whereas a function can have any type of dependence on time, coordinates, results, etc. This is why it is not possible to let a function change the geometry.

Regards,
Henrik
Hi, The geometry can only depend on parameters, not on functions. But parameters can be very general expressions of other parameters. The difference between a parameter and a function is that the parameter is fixed within a certain study step, whereas a function can have any type of dependence on time, coordinates, results, etc. This is why it is not possible to let a function change the geometry. Regards, Henrik

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