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boundary condition for outlet
Posted Jul 6, 2012, 2:25 a.m. EDT Fluid & Heat, Computational Fluid Dynamics (CFD), Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers 2 Replies
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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 Jul 11, 2012, 4:31 p.m. EDT
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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
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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
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