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Is there any way for import a file from the outside (i.e. background) as an initial value

Posted Oct 23, 2019, 11:20 p.m. EDT Heat Transfer, Parameters, Variables, & Functions Version 5.4 3 Replies

大卫 曾
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I have an initial temperature field distribution T0(r,z,t=0), and I want to use that as my initial field to study the thermal diffusion problem. How to do this?

3 Replies Last Post Oct 24, 2019, 11:03 p.m. EDT
Jeff Hiller COMSOL Employee

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Posted: 5 years ago Oct 24, 2019, 9:28 a.m. EDT
Updated: 5 years ago Oct 24, 2019, 5:30 a.m. EDT

I assume that the initial temperature field distribution is something you measured or computed outside of COMSOL. If so, you can use Interpolation Functions for that. There are many threads on this Discussion Forum on this topic, and of course the COMSOL Multiphysics Reference Manual, accessible from File > Help >Documentation.

If the initial temperature field distribution is computed by COMSOL, then you would use consecutive study steps in a single model.

Best regards,

Jeff

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Jeff Hiller
I assume that the initial temperature field distribution is something you measured or computed outside of COMSOL. If so, you can use Interpolation Functions for that. There are many threads on this Discussion Forum on this topic, and of course the COMSOL Multiphysics Reference Manual, accessible from File > Help >Documentation. If the initial temperature field distribution is computed by COMSOL, then you would use consecutive study steps in a single model. Best regards, Jeff
大卫 曾
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Posted: 5 years ago Oct 24, 2019, 9:04 p.m. EDT

Dear Jeff, Yes, the initial temperature field distribution is computed outside of COMSOL. I want to study the evolution of the temperature field with the help of COMSOL. Thank you for your suggestion. Zeng

Dear Jeff, Yes, the initial temperature field distribution is computed outside of COMSOL. I want to study the evolution of the temperature field with the help of COMSOL. Thank you for your suggestion. Zeng
大卫 曾
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Posted: 5 years ago Oct 24, 2019, 11:03 p.m. EDT

Dear Jeff, I have used the Interpolation Functions to import my calcuated data,which is shown is the figure 'res.JPG'. However, it was a far cry from what I wanted. The initial field that I want to express is shown in figure 'matlab.JPG', which is handled by matlab. I don't know how to express this result in comsol. Especially if my initial result is near the boundary, how do I specify the its location. I searched the case database for a long time but could not find a similar case. I hope you can directly give me some links to similar cases. Thank you. Zeng

Dear Jeff, I have used the Interpolation Functions to import my calcuated data,which is shown is the figure 'res.JPG'. However, it was a far cry from what I wanted. The initial field that I want to express is shown in figure 'matlab.JPG', which is handled by matlab. I don't know how to express this result in comsol. Especially if my initial result is near the boundary, how do I specify the its location. I searched the case database for a long time but could not find a similar case. I hope you can directly give me some links to similar cases. Thank you. Zeng

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