Discussion Forum

Hi everyone,

I'm relatively new to COMSOL and have to find a solution for the following problem:

Given is a simple geometry and a gaussian laser beam runs over it once. The used material is defined by a few temperature dependent properties through analytical functions (i.e. half-time, rate constant, ...).
In addition to the heat transfer I use a global ODE. In this ODE, I want to use these temperatue dependent properties for solving. Is this even possible?

I give you an example to illustrate what I mean:

The above mentioned "half-time" is described as an analytical function, temperature in Kelvin on the x-axis, half-time in minutes on the y-axis. In my ODE, I want to make use of this half-time function to solve the ODE as the laser beam moves over my geometry (and therefore a change in temperature is happening, which in turn influences the half-time).

My approach so far was: Calling the material property function in my ODE term, so it looked something like this:

(root.comp1.mat1.def.t1_2)^(Rest of function term)

But unfortunatelly this doesn't work at all.

I hope that I described the problem sufficiently. I would really appreciate some ideas how to solve this problem. If you have questions, don't hesitate to ask them.

Best regards,
Chris