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 The information provided may be out of date.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.

Reynolds Number in Micro Diffusers-Nozzle

Please login with a confirmed email address before reporting spam

Hi All,

What is the suitable formula to be used to calculate Reynolds number in a micro diffuser-nozzle structure, as the picture attached?

I am using:
Reynolds number = hydraulic diameter*density*velocity/dynamic viscosity

When I go up to Re = 100 I keep getting an error telling me:

"Failed to find a solution. Maximum number of Newton iterations reached. Returned solution is not converged."

How can I solve that?

Thanks.
Marwan


0 Replies Last Post 2014年12月9日 GMT-5 12:09
COMSOL Moderator

Hello Marwan Nafea

Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.

If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.

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.