Objective function for time-dependent optimization in thin film simulation

Joan Castello Belenguer

Please login with a confirmed email address before reporting spam

Hello everyone,

I recently started working on COMSOL to solve a problem on a 2D squeeze film gas-lubrication. I want to perform a time-dependent optimization, however I am encountering some issues.

As my geometry is a short height cylinder surface which represents the profile, and the pressure is evaluated around the circular surface. My idea is to perform the time dependent optimisation is to use a Squared Error function.

The idea is to minimize the value of the function to find the steady stable pressure range of the system. However, I am not able to introduce the pfilm dependent variable, for which the Thin-Film Flow (tff) module is solving, as a variable in the objective function, however Comsol returns a message saying that the variable pfilm is not defined, also I tried using "tff.pfilm". I also tried using the average operator and integral operator but returns the same error.

I dont have that much experience with comsol yet, is anyone able to help me or provide any hints?

Thank you! Joan



1 Reply Last Post 2024年10月16日 GMT+2 09:22
Acculution ApS Certified Consultant

Please login with a confirmed email address before reporting spam

Posted: 2 weeks ago 2024年10月16日 GMT+2 09:22

Maybe "comp1.tff.pfilm" instead, if the variable in question actually exists? Don't know anything about the physics though.

-------------------
René Christensen, PhD
Acculution ApS
www.acculution.com
info@acculution.com
Maybe "comp1.tff.pfilm" instead, if the variable in question actually exists? Don't know anything about the physics though.

Reply

Please read thediscussion forum rulesbefore posting.

Pleaselog into post a reply.

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

Baidu
map