Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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.

Effect of moving boundary on fluid flow

Please login with a confirmed email address before reporting spam

Hi everyone,

I am trying to model the effect of moving a small circle within a larger rectangle on the fluid flow within the space between the circle and the rectangle; I use moving mesh module (ALE) and Incompressible navier-stokes module.
(I only have 1 subdomain which is the space between the circle and rectangle)


First I solve the ALE module: inner circle moves with the speed of 0.1 m/s in the x-direction while the rectangle boundaries are set to zero mesh displacement.

Then I use this result to see the effect of circle movement on the fluid velocity. This time I set all boundaries as walls.

But I get convergence error. Is it the correct way of studying the effect of moving boundary on the fluid flow?

Any help is highly appreciated.


Thanks
Hesam

PS: I guess what I am trying to do is similar to this: www.youtube.com/watch?v=22ylDEEgPKI

1 Reply Last Post 11 nov. 2011, 11:47 UTC−5

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 11 nov. 2011, 11:47 UTC−5
Hello,

I have a similar problem, but i dont know solve it. Did you solve your problem ?
Hello, I have a similar problem, but i dont know solve it. Did you solve your problem ?

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.