Menu

Discussion Forum

New Discussion
Filtrer

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.

unit normal vector

Posted 23 mai 2013, 13:10 UTC−4 0 Replies

Mehrdad Arjmand
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hello,

I am solving a PDE using coefficient mode. I have a scalar filed, variable C, which has arbitrary boundary inside the domain (picture 1) that evolves with time. I want COMSOL to find the unit normal vector for each point along the BOUNDARY at each time step (n=gradient(C) / abs (gradient(C))=(Cx ex+Cy ey)/sqrt(Cx^2+Cy^2)). But it does not give any reasonable answer (ny is shown in picture 2).

So can anyone help me to find unit normal vector to an arbitrary evolving inner boundary?

Thank you,
Mehrdad

Attachments:

0 Replies Last Post 23 mai 2013, 13:10 UTC−4
COMSOL Moderator

Hello Mehrdad Arjmand

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

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