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Error: fem.appl{1}.bnd.type{1} must have any of the values 'Js', 'A', 'A0'
Posted Oct 9, 2009, 12:00 p.m. EDT 4 Replies
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Hello,
I'm trying to model a generator with Comsol through MATLAB.
For now I have almost done a copy/paste of the Comsol example "generator 2d" for what concerns the boundaries properties. So, as in this example, I want the outside boundary to be of type 'Magnetic insulation' and the others to be 'continuous'.
I wrote this:
bnd.type = {'cont','A0'};
but then I got this error, by calling multiphysics(fem).
I don't understand why I can't use the type 'cont'? Although there is no problem in "generator 2d".
Here is another line that might be related :
appl.shape = {'shlag(2,''lm1'')','shlag(2,''Az'')'};
Thanks
Ronan
I'm trying to model a generator with Comsol through MATLAB.
For now I have almost done a copy/paste of the Comsol example "generator 2d" for what concerns the boundaries properties. So, as in this example, I want the outside boundary to be of type 'Magnetic insulation' and the others to be 'continuous'.
I wrote this:
bnd.type = {'cont','A0'};
but then I got this error, by calling multiphysics(fem).
I don't understand why I can't use the type 'cont'? Although there is no problem in "generator 2d".
Here is another line that might be related :
appl.shape = {'shlag(2,''lm1'')','shlag(2,''Az'')'};
Thanks
Ronan
4 Replies Last Post May 17, 2010, 11:06 a.m. EDT
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Posted:
2 decades ago
Hi,
I am getting the same error (in Chemical Eng module):
fem.appl{2}.bnd.type{1} must have any of the values 'C'
with the boundaries defined as:
bnd.type = {'N0', 'cont', 'C', 'N', 'Nc'};
bnd.c0 = {0, 0, 'c_in', 0, 0};
bnd.N = {0, 0, 0, 'v*c*(1-R)', 0};
Has anyone got an answer (from Comsol?)?
Cristian
I am getting the same error (in Chemical Eng module):
fem.appl{2}.bnd.type{1} must have any of the values 'C'
with the boundaries defined as:
bnd.type = {'N0', 'cont', 'C', 'N', 'Nc'};
bnd.c0 = {0, 0, 'c_in', 0, 0};
bnd.N = {0, 0, 0, 'v*c*(1-R)', 0};
Has anyone got an answer (from Comsol?)?
Cristian
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Posted:
2 decades ago
Hi,
I am getting the same error (in Chemical Eng module):
fem.appl{2}.bnd.type{1} must have any of the values 'C'
with the boundaries defined as:
bnd.type = {'N0', 'cont', 'C', 'N', 'Nc'};
bnd.c0 = {0, 0, 'c_in', 0, 0};
bnd.N = {0, 0, 0, 'v*c*(1-R)', 0};
Has anyone got an answer (from Comsol?)?
Cristian
I am getting the same error (in Chemical Eng module):
fem.appl{2}.bnd.type{1} must have any of the values 'C'
with the boundaries defined as:
bnd.type = {'N0', 'cont', 'C', 'N', 'Nc'};
bnd.c0 = {0, 0, 'c_in', 0, 0};
bnd.N = {0, 0, 0, 'v*c*(1-R)', 0};
Has anyone got an answer (from Comsol?)?
Cristian
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Posted:
2 decades ago
Hi,
In the meanwhile I solved my problem myself.
The reason for the error was that I had made a mistake allocating the boundaries. For example, when a boundary is an external boundary for the whole assembly, Comsol then only allows a certain value for this boundary. In my case the outer perimeter boundaries couldn't be set to 'continuous'.
I hope this helps
Bye
Ronan
In the meanwhile I solved my problem myself.
The reason for the error was that I had made a mistake allocating the boundaries. For example, when a boundary is an external boundary for the whole assembly, Comsol then only allows a certain value for this boundary. In my case the outer perimeter boundaries couldn't be set to 'continuous'.
I hope this helps
Bye
Ronan
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Posted:
1 decade ago
Hi,
I've got the same trouble.
COMSOL uses a different syntax depending on the application mode you are using.
For instance, to set a "no diffusive flux condition" there is a different syntax in the Earth Science module and in the Chemical Eng. Module.
My suggestion is to set a new (very simple) model using the COMSOL GIU, then save as M-file and look at the syntax.
This is what I did to solve my problem and fix the error...it works!
Bye,
Iacopo
I've got the same trouble.
COMSOL uses a different syntax depending on the application mode you are using.
For instance, to set a "no diffusive flux condition" there is a different syntax in the Earth Science module and in the Chemical Eng. Module.
My suggestion is to set a new (very simple) model using the COMSOL GIU, then save as M-file and look at the syntax.
This is what I did to solve my problem and fix the error...it works!
Bye,
Iacopo