Menu

Discussion Forum

New Discussion
Filter

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.

Modeling Convection

Posted Jan 6, 2025, 12:49 p.m. EST Fluid & Heat, Modeling Workflow, Physics Interfaces Version 6.0 1 Reply

Sayee Srikarah Volaity
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hello all,

I want to model two squares placed inside an air chamber. One of the square is at a specified temperature and I want to know the temperature of the other square due to the temperature of the first square. I think convection plays a major part too as buoyancy effects come in as the air gets heated from the first square.

Would be great if anyone could help me with the module to use and the appropriate boundary conditions.

Thanks!

1 Reply Last Post Jan 6, 2025, 8:22 p.m. EST
David Greve
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 6 months ago Jan 6, 2025, 8:22 p.m. EST

You can either invoke the Bouissineq approximation in the standard spf and ht modules or use the CFD module which solves the full Navier-Stokes equations. Have a look at

https://www.comsol.com/blogs/using-the-boussinesq-approximation-for-natural-convection

to get started.

Be aware that convergence may be an issue that requires a careful choice of solver and other settings. This has been my experience, in contrast to some other modules where convergence is more or less guaranteed with default settings.

You can either invoke the Bouissineq approximation in the standard spf and ht modules or use the CFD module which solves the full Navier-Stokes equations. Have a look at https://www.comsol.com/blogs/using-the-boussinesq-approximation-for-natural-convection to get started. Be aware that convergence may be an issue that requires a careful choice of solver and other settings. This has been my experience, in contrast to some other modules where convergence is more or less guaranteed with default settings.

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.

Suggested Content