Discussion Forum

Posted: 8 years ago 7 lug 2016, 18:48 GMT-4

You can find variable names after enabling Equation View. But there are several related to Ey, and I'm not sure which one is which one... -- Pu, ZHANG DTU Fotonik

Posted: 8 years ago 7 lug 2016, 23:06 GMT-4

Thanks Zhang ! Let me see what can i get from it. -RA

Posted: 8 years ago 8 lug 2016, 08:41 GMT-4

Hello Rishad and Pu, Besides using the Equation View button, another approach consists in using the postprocessing tools, see for instance https://www.comsol.com/community/forums/general/thread/114702 . Another neat approach is now available in version 5.2a. We've added (or, to be more accurate I should say, we've greatly expanded) autocomplete. So, let's say you want to set the conductivity to "1+the y component of the electric field computed by the ec physics interface" but you don't know the syntax for the y component of the electric field computed by the ec physics interface. In the text field where you specify the conductivity, you can start typing "1+ec." then go Ctrl+Space, and the GUI will tell you all the possible completions (and their explanations), one of which is ec.Ey . See screenshot attached. This is one of my favorite new features at version 5.2a . Best, Jeff

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• ForRA.png

Posted: 8 years ago 8 lug 2016, 11:10 GMT-4

Morning Jeff, Thank you very much for your informative reply. I am trying to do exactly what you just said ! I am trying to vary the material conductivity with electric field component in y direction. Moreover, my conductivity here is an-isotropic in nature. So, in this case I would like to vary conductivity in x direction with electric field component in y direction. However, I am using Electromagnetics Waves module, COMSOL 5.1 and I want to know whether you have the same facility in this version as well. I used emw.Ey to define E-field in y direction but still showing me an error. Would you help me to define conductivity in x direction (anisotropic) as a function of Electric field in y direction for COMSOL 5.1? I have looking for these for hours and I am sure that I am missing something. Thanks, RA

Posted: 8 years ago 8 lug 2016, 11:26 GMT-4

Hi Rishad, The autocomplete feature is new (or, again, to be more accurate, greatly expanded) at version 5.2a. The other techniques discussed above should work at 5.1. Best, Jeff

Posted: 8 years ago 8 lug 2016, 17:08 GMT-4

Thanks Jeff for your response. I am trying to get some results, hope it works. -RA

Posted: 8 years ago 11 lug 2016, 10:24 GMT-4

Hi Jeff, I have tried vary the conductivity in x direction with 1+electric field in y direction, in COMSOL 5.1. I am not sure whether the physics is working or not. Would you please let me know how to do this in COMSOL 5.1 version. Please provide a screenshot of the conductivity tensor in this case for better understanding. I have attached a screenshot to show I did it in COMSOL 5.1 version. Not sure though about the physics inside working or not. Thanks, RA

Posted: 8 years ago 11 lug 2016, 10:28 GMT-4

Hello Rishad, I am not an expert in EM. If your license is under a subscription contract, I invite you to contact COMSOL technical support at support@comsol.com . Best regards, Jeff

Posted: 8 years ago 11 lug 2016, 10:30 GMT-4

Please find the screenshot here. -RA

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• CSforum.png