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 The information provided may be out of date.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.
Backward Problem
Posted 19.03.2013, 07:35 GMT-4 Heat Transfer & Phase Change, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 4.2a 0 Replies
Please login with a confirmed email address before reporting spam
I like to scale a given heatflux distribution to reach a maximum temperature in a domain.
If I know the location where I expect this max. temperature, I can do this via a global equation: f(T-Tmax) to obtain a scaling variable qscale for the heat flux distribution and an integration operator: Tmax=intop(T) specified at the point where I want to reach the temperature Tmax.
But what if I don't know the location of Tmax in the domain?
If I exchange the integration operator intop with a maximum operator maxop on the domain I get:
*******
Failed to find a solution.
Singular matrix.
There are 1 void equations (empty rows in matrix) for the variable mod1.qscale
at coordinates: (0,0), ...
Returned solution is not converged.
******
Can this issue be solved without the optimization module ?
Thank you very much for any help.
--
______
Flanell
Hello Flanell
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.