Different thermal results

Hello, Does any one know how my results would have changed? I had a temperature change of about 7 degrees, but now I am getting a bigger change.   I don't remember changing any settings, and I don't have file anymore from the model with only 7 degree difference.
Thank you,

The solvers and thermal models have not been changed for quite awhile, and we have many regression test models that would detect any significant fundamental changes.

Unfortunately if you don't have a model to compare with it is quite hard for anyone to say what has changed.

You can try to export the model as a ".fes" model script which tracks the modes changes (instead of saving the binary model data it saves a log of GUI actions in a JSON text file), or possible export as a MATLAB ".m" script file. However, if you have loaded/saved repeatedly in the same model the old changes might have been overwritten.

Thank you for response. Understandable. I recreated the previous model that gave me closer to 6.7 degrees difference. I have included link to .fea flile. https://1drv.ms/u/c/3c368823db69f219/EZrxDjKmVqBLjAQKBgsoolYBWz-cyvzEdCN7sQL2N_Tc5A?e=e9L47c Let me know if link does not work? After applying the equation settings for the matrix material as shown in model. It solves as shown in the inserted image  When I go back in the I noticed the matrix material equation setting matches the fiber material. So, when I apply the equation setting for fiber material, it changed the equation setting of matrix material also. Is there a way to avoid this in the future?

Can you provide a simple "step-by-step instructions" how to reproduce the issue after loading your file?

After loading I select equation mode to confirm equation settings. Under the equation settings, the subdomain 5 is changed density to 1000, heat capacity to 1500, and thermal conductivity to 0.2. After selecting apply. I select all other domains except 5 and make sure density is 2500, heat capacity, 700, and thermal conductivity as 300. and hit apply and then ok to exit equation settings. Since Boundaries are already set. I go to solve and select solve with initial expression as initial condition. The post-processing result show degree difference of about 6.67 degrees. I went back to confirm equation settings and I found out that the subdomain 5 equation coefficients were same as those for the other domains. This created some hesitation in trusting results. Thank you for your assistance!

Thank you for clarifying. I think it might be due to selecting all domains with either "Ctrl+A" or the mouse (after changing values for a single subdomain.

If you perform the steps as a workaround for now:

- Select one or more subdomains (for example 5)
- Change density to 1000, heat capacity to 1500, and thermal conductivity to 0.2.
- Press "OK" (without selecting other subdomains) first.
- Reopen the "Subdomain Settings" dialog box to check/modify the other domains.
- Solve

I think this should work.