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January 4, 2013 9:05am UTC

Personalized heat source

Good morning everybody,

I am a novice in use of COMSOL, I want to simulate the propagation of heat through a material, sounds easy but my heat source is a surface defined by a matrix (every pixel is a source with its own magnitude),

I want to know if COMSOL can simulate this kind of source, and how?!

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January 8, 2013 2:08pm UTC in response to Ivar Kjelberg

Re: Personalized heat source

Hi,

Thank you very much,
With some standing back I see that my request was "basic"!
Now I have an other question, to define my function I need to export data from matlab, witch are defined on a certain variation range, how can I indicate to COMSOL that my function is equal to 0 out that range ?

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January 10, 2013 11:00am UTC in response to Magnus Ringh

Re: Personalized heat source

Hi,
That's exactly what I want, thanks,
When i enter my function in heat source, it becomes orange, telling me that the unit given not expected, depite I didn't define any unit neither in my folder nor in the expression of my function, any idea ?!

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January 10, 2013 12:25pm UTC in response to Attia Benselama

Re: Personalized heat source

Hi,

My guess is that you have not assigned units to the input argument and function output in the Units section of the Interpolation function. Using

Arguments: K
Function: W/m^3

defines an interpolation function where the heat source values (W/m^3) are functions of the temperature (K).

If you want to treat the interpolation function as a unitless function, you need to "de-dimensionalize" the temperature variable used as argument when calling the function using unit syntax: T[1/K]

Best regards,
Magnus Ringh, COMSOL

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