Menu

Discussion Forum

New Discussion
Filtra

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.

Getting different values each time running the same simulation

Posted 27 dic 2018, 16:54 CET Electromagnetics, Electromagnetic Heating, Low-Frequency Electromagnetics Version 5.3 2 Replies

Hari Gurumoorthi
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hello all,

I am working on Comsol 5.3, using a time dependent ion flow model with 2 Partial differential equations. Everytime I run the same simulation (without any change) i get totally different graphs. Can anybody pls suggest me ways to solve this issue. Thank you so much..

With best regards Hari

2 Replies Last Post 4 gen 2019, 15:39 CET
Robert Koslover Certified Consultant
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 5 years ago 1 gen 2019, 06:29 CET
Updated: 5 years ago 1 gen 2019, 06:31 CET

That's strange. By any chance, do you have (or did you define) any random number generators in your problem? That would be my first guess, since that would do it. But if not, then I am curious: Does it give different results if you clear the solution before you recompute? Does it give different results if you shutdown Comsol Multiphysics and then restart it? Does it give different results if you restart your computer between runs? How about if you save the file with two different names, load them both at the same time, and execute them both? Maybe you should post your model file to the forum!

-- Happy New Year.

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
That's strange. By any chance, do you have (or did you define) any random number generators in your problem? That would be my first guess, since that would do it. But if not, then I am curious: Does it give different results if you clear the solution before you recompute? Does it give different results if you shutdown Comsol Multiphysics and then restart it? Does it give different results if you restart your computer between runs? How about if you save the file with two different names, load them both at the same time, and execute them both? Maybe you should post your model file to the forum! -- Happy New Year.
Josh Thomas Certified Consultant
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 5 years ago 4 gen 2019, 15:39 CET

I would check Initial Values of Variables Solved For. Are you sure each time you click compute you are starting from the same initial conditions?

-------------------
Best regards,
Josh Thomas
AltaSim Technologies
I would check Initial Values of Variables Solved For. Are you sure each time you click compute you are starting from the same initial conditions?

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content