Menu

Discussion Forum

New Discussion
查找

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 The information provided may be out of date.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.

COMSOL 4.2a bug ?

Posted 2011年12月17日 GMT-5 02:23 MEMS & Nanotechnology, Fluid & Heat, MEMS & Piezoelectric Devices, Computational Fluid Dynamics (CFD), Structural Mechanics Version 4.2, Version 4.2a 2 Replies

Chiwei Ong
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi, dear all,

I seriously hope it is my personal mistake, not a bug in 4.2a.
I draw a rectangular and do the laminar flow module, inlet 2.6m/s on one of boundary, then just run the study.
I plot the inlet\ velocity, to make sure the inlet velocity is 2.6m/s, but in COMSOL 4.2a it give me 0.026m/s.

I ask my friend plot the same thing in 4.2, it return correct 2.6m/s.

Can somebody help me confirm it is a bug or my personal mistake? as it looks like postprocessing data in COMSOL 4.2a scale down the unit.

Thank you.

Attachments:

2 Replies Last Post 2011年12月17日 GMT-5 03:22
Chiwei Ong
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011年12月17日 GMT-5 02:40
I apologize about the mistake.

The solution is i do not clear the solution in 4.2a and rerun it again.

now solve already.

sorry.
I apologize about the mistake. The solution is i do not clear the solution in 4.2a and rerun it again. now solve already. sorry.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 2011年12月17日 GMT-5 03:22
Hi

indeed I would be astonished thaat you get such a "mistake" without other having noticed it ;) a factor 1000 is typically a unit error meters to mm, but could be other things.

One rule I do (at best) is to relaunch a fresh COMSOL for each new model, as when you delete an old one and rebuild, you are nwever 100% sure that ALL default variables are reset, there are so many inside COMSOL ...

--
Good luck
Ivar
Hi indeed I would be astonished thaat you get such a "mistake" without other having noticed it ;) a factor 1000 is typically a unit error meters to mm, but could be other things. One rule I do (at best) is to relaunch a fresh COMSOL for each new model, as when you delete an old one and rebuild, you are nwever 100% sure that ALL default variables are reset, there are so many inside COMSOL ... -- Good luck Ivar

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