COMSOL: Setting up simple optimization problem

[tdh89]

Hi all, i have some doubts about setting the COMSOL optimization module.

My aim is quite simple, i should find the optimal value of a variable to minimize the objective equation.
In particular i should set up the parameter C in this equation(which represents the outlet pressure of a laminar flow model):

S=Q*C+po

in order to minimize the following equation:

abs(p-15000)

Where p is the pressure coming out from linear flow model (spf) and 15000 is a reference pressure, both applied to domain.
The algorithm is quite simple, comsol should:

1)assign a value to C
2)estimate the value of domain pressure( coming out from laminar flow model)
3)verify if optimality condition is satisfied, otherwise start again from 1

My doubt is about implementation: which kind of objective should i use (integral objective, probe objective...)? Should i use inequality constraints too?

Best regards

 

[Vailanor]

You can use an integral objective in the optimization module of COMSOL. This objective would be to minimize the difference between the outlet pressure, p, and the reference pressure, 15000. You can also set an inequality constraint to ensure that the pressure is always greater than or equal to the reference pressure.