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.

Constrained Optimization

Please login with a confirmed email address before reporting spam

I am trying to impose a total energy dissipation constraint on a fluid flow topology optimization problem.

The equation is: ∅=∫(τ:S+α(u.u))dV

Where α is a function of the density variable.

I added the expression (intop1(spf.Qvd+alpha*(u^2+v^2))) in the constraints list in the optimization node and since the expression is in the integral form, I guess it is a global expression.

I evaluate the total energy dissipation after each optimization and the value is always way above the upper bound. How can I impose this constraint on my problem?


1 Reply Last Post 17.08.2020, 01:27 GMT-4

Please login with a confirmed email address before reporting spam

Posted: 4 years ago 17.08.2020, 01:27 GMT-4

I raised the constraint penalty factor and the problem was solved.

I raised the constraint penalty factor and the problem was solved.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.