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Optimization without Optimization-Module
Posted Jan 17, 2011, 7:40 a.m. EST Version 3.5a 2 Replies
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Hi,
I have a Problem, which seemed to me to be not a very tough one:
I have a 2D stationary heat problem where a specified a heat source on one subdomain. Now I want to adjust this heat source (a scalar varaiable) so that I got a specified temperature at a point. How can I do this?
It seems to me that this is a "optimization problem" (abs(T-Tset)->min; Q_heat is source variable) . But using this module for solving this little problem is like cracking a nut with a sledgehammer :) . At least I don't have access to this module. ;)
Any suggestions or ideas?
Best regards
I have a Problem, which seemed to me to be not a very tough one:
I have a 2D stationary heat problem where a specified a heat source on one subdomain. Now I want to adjust this heat source (a scalar varaiable) so that I got a specified temperature at a point. How can I do this?
It seems to me that this is a "optimization problem" (abs(T-Tset)->min; Q_heat is source variable) . But using this module for solving this little problem is like cracking a nut with a sledgehammer :) . At least I don't have access to this module. ;)
Any suggestions or ideas?
Best regards
2 Replies Last Post Jan 17, 2011, 8:40 a.m. EST
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Posted:
1 decade ago
Hi
certanly, for simple cases you can use COMSOL to do a simple least square optimisation (without the full optimisation module). You need to add a global variable, or a separate ODE where you define your variable w.r.t. some physics or rule. COSMOL will then solve this with the rest.
There are a few examples in the doc, i.e.3.5a structural doc the "torque load case", and I believe a few on the KB (not sure exactly where). There are also a few examples in the book of Zimmerman if I remember right
--
Good luck
Ivar
certanly, for simple cases you can use COMSOL to do a simple least square optimisation (without the full optimisation module). You need to add a global variable, or a separate ODE where you define your variable w.r.t. some physics or rule. COSMOL will then solve this with the rest.
There are a few examples in the doc, i.e.3.5a structural doc the "torque load case", and I believe a few on the KB (not sure exactly where). There are also a few examples in the book of Zimmerman if I remember right
--
Good luck
Ivar
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Posted:
1 decade ago
Thanks! I solved it :)