CODEWITHSUNDEEP
finite-element-analysisfreefem++
user32335
user32335

Reputation: 1

Multiple sub-regions in FreeFem

I am using FreeFem++ to solve the Poisson equation over a complicated geometry. I want to solve it over a heterogeneous region. The value of f in ΔΦ=f changes between multiple sub-regions. Is there any way to do this? So far I have found only examples of homogenous regions. I am relatively new to finite element analysis.

Upvotes: 0

Views: 340

Answers (1)

compphys97
compphys97

Reputation: 1

I'm not a FreeFEM++ expert by any stretch, but have you tried defining f on the different regions as

func f = f_1(x,y)*(condition_1) + ... + f_n(x,y)*(condition_n)

For example, if I were doing this on a region defined by a smaller circle of radius a on which f=x*y, surrounded by a bigger circle of radius b on which f=sin(x), I'd do

func f = x*y*(sqrt(x^2+y^2)<=a) + sin(x)*(sqrt(x^2+y^2)>a)

Of course, this depends on the conditions being mutually exclusive.

Upvotes: 0

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