Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
T_boundary ≠ T_boundary_condition
Posted Mar 3, 2022, 4:54 a.m. EST Heat Transfer, Modeling Tools & Definitions, Parameters, Variables, & Functions 3 Replies
Please login with a confirmed email address before reporting spam
Hallo,
In my simplified 2d-square model I defined the upper boundary to have a temperature boundary condition of a measured temperature signal (over time) of the Royal Netherlands Meteorological Institute (KNMI) so I expext that after running the temperature signal (over time) of the upper boundary is exactly the same as the T_KNMI plot.
Unfortunately this is not the case.
Can someone please help me out? (see attached model)
Kind regards, Simone
Please login with a confirmed email address before reporting spam
Comsol doesn't know how and when your data are changing. Look at your settings for time-stepping. Use intermediate or strict and specify a time step that corresponds to your KNMI data.
-------------------Lars Gregersen
Comsol Denmark
Please login with a confirmed email address before reporting spam
Hello Simone,
Are you specifying the time steps taken by the solver, rather than relying on automatic time-stepping? If not, you should, to ensure that they are small enough to capture the variations in your inputs.
Best,
Jeff
/Edit: Looks like Lars beat me to it :) /
-------------------Jeff Hiller
Please login with a confirmed email address before reporting spam
Thank you very much, It worked!