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If statement in material properties
Posted Aug 30, 2015, 3:49 a.m. EDT Materials Version 5.0 2 Replies
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Hi, I am a complete beginner in COMSOL and I am wondering how to include an if statement in material properties. For example, I want the density,p to be dependent on temperature, T such that if T<273K, p=998 and if T>273K, p=1000. Thanks :)
2 Replies Last Post Aug 30, 2015, 5:06 a.m. EDT
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Posted:
9 years ago
Hi
there are a simpler way for 2 levels:
998+2*(T[1/K]>273)
But as COMSOL solvers (as we were thought once in our math courses ;) prefer continuous functions you should rather use one of the built in Step functions with smoothing for the transition region, or the piecewise interpolation functions. Check the sub nodes under "Definitions", and check out the Videos on functions and operators
--
Good luck
Ivar
there are a simpler way for 2 levels:
998+2*(T[1/K]>273)
But as COMSOL solvers (as we were thought once in our math courses ;) prefer continuous functions you should rather use one of the built in Step functions with smoothing for the transition region, or the piecewise interpolation functions. Check the sub nodes under "Definitions", and check out the Videos on functions and operators
--
Good luck
Ivar
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Posted:
9 years ago
Alright Thanks for the information :)