Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
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.
Help: Why is Initial value changed after calculation?
Posted 20.08.2013, 21:04 GMT-4 Materials Version 4.3a 1 Reply
Please login with a confirmed email address before reporting spam
Hello, everyone. I build two models （both are PDEs）in one file.
For the first one, initial value is A0, a log-normal distribution.
For the second one, initial value is B0, also a log-normal distribution. It uses the result of first model as an input parameter.
Then I solve two PDEs together. When I get the solution of the second model, I plot solution at time 0. Theoretically it should be the same as B0. But I get a totally different value. Why does this happen?
I've tried to use finer mesh grid and smaller tolerance value, but it doesn't work.
Thanks for your help.
For the first one, initial value is A0, a log-normal distribution.
For the second one, initial value is B0, also a log-normal distribution. It uses the result of first model as an input parameter.
Then I solve two PDEs together. When I get the solution of the second model, I plot solution at time 0. Theoretically it should be the same as B0. But I get a totally different value. Why does this happen?
I've tried to use finer mesh grid and smaller tolerance value, but it doesn't work.
Thanks for your help.
1 Reply Last Post 21.08.2013, 18:16 GMT-4
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Is there anyone who knows something about it?