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.
boundary condition for outlet
Posted 06.07.2012, 02:25 GMT-4 Fluid & Heat, Computational Fluid Dynamics (CFD), Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers 2 Replies
Please login with a confirmed email address before reporting spam
i have a small doubt regarding the otlet condition in fluid flow simulation.
if i have a outlet tangential velocity is not zero, can i use outlet condition directly,
or do i need to create a imaginary long section at the outlet where the flow can be assumed to be normal and then use the outlet condition,
if i have a outlet tangential velocity is not zero, can i use outlet condition directly,
or do i need to create a imaginary long section at the outlet where the flow can be assumed to be normal and then use the outlet condition,
2 Replies Last Post 11.07.2012, 16:31 GMT-4
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
if your velocity value is not a fixed value, only the direction, you could try to set up a normal velocity condition, turn on the "Preferencs - equation view" and check the constraints and weak condition COMSOL uses to get a "normal flow", then adapt this to impose an oblique flow.
At least this is my firsth thought, and I believe this should work, at least until someone can prove it will not ;).
Give it a try
--
Good luck
Ivar
if your velocity value is not a fixed value, only the direction, you could try to set up a normal velocity condition, turn on the "Preferencs - equation view" and check the constraints and weak condition COMSOL uses to get a "normal flow", then adapt this to impose an oblique flow.
At least this is my firsth thought, and I believe this should work, at least until someone can prove it will not ;).
Give it a try
--
Good luck
Ivar
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Thanks Ivar,
I need to work with two phase models.
i have been working on this for weeks now. i am attaching just a test model for simplicity.
But i have been unable to get the results. please help me out. i need it desperately. thanks again
I need to work with two phase models.
i have been working on this for weeks now. i am attaching just a test model for simplicity.
But i have been unable to get the results. please help me out. i need it desperately. thanks again
Attachments: