Menu

Discussion Forum

New Discussion
查找

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.

Solution at time 0 gives fully developed flow with initial values set to 0.[Creeping flow]

Posted 2017年6月30日 GMT-4 19:50 Computational Fluid Dynamics (CFD), Structural Mechanics Version 5.1 0 Replies

Arturo Sosa Lombardo
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi, I'm fairly new to COMSOL but have managed to get the creeping flow, laminar and turbulent modules to work. However I'm skeptical of the answer that is given, for all modules the result at time 0 shows a fully developed/ or some velocity magnitude when everything is supposed to be still (v=0). I'm starting the simulations on something simple, so a straight pipe with no slip boundary condition for the creeping flow module. My inlet velocity is 2.004E-8 m/s and all pressures are set to 1[atm], also my initial values for the velocity expression are all 0 in the 3 directions.

Just in case it wasn't clear, the picture attached shows the result for time 0; the fluid in the pipe is supposed to be stationary at this time but for whatever reason COMSOL shows a result of a fully developed fluid flow. Why is this the case? And how can I fix it?

If more information is needed please let me know! Thank you for your time.

Attachments:

0 Replies Last Post 2017年6月30日 GMT-4 19:50
COMSOL Moderator

Hello Arturo Sosa Lombardo

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.

Suggested Content