Comsol Multiphysics Heat Transfer

[mherna48]

I have a problem where the coefficient of thermal conductivity changes as temperature changes. Where/how do I input this into comsol?

 

[Nick Bruno]

just make a global expression for thermal conductivity as a function of temperature. it will work the rest out.

 

[mherna48]

I don't know the equation for thermal conductivity as a function of temperature to do that. I was trying to find that equation, given over 2000 data points that plot conductivity versus Temperature.

I have since created a temperature profile(Thermal goggle view) by interpolating those data points. Now I'm trying to find the equation to the Temperature profile. Do you know how to go about doing this?

 

[Nick Bruno]

I would just suggest using MATLAB, input ur data points as a matrix and plot it, then use curve fitting.

 

[mherna48]

Hey, Thanks again. I figured out how to do it. I went into post processing and plotted a line plot of the temperature along the z-axis. I then exported the data to a .txt file and opened it in Excel. Then I did the line fitting there.

Thanks again.