[vidyadhar]

I want to visualize the vortex structures in the flow through a pipe junction having square cross-section.

If I select negative value of Lambda-2 criterion in paraview, I find structures near the walls. For positive values of Lambda2, the structures are away from the walls.

Also, I am getting same pattern of vortex structures with positive values of Lambda2 which I do get with positive value of Q criterion.

So,
1) should I select positive values of Lambda2 or negative values?
2)Do Q- and Lambda2- criteria give similar structures?


Thanks in advance!!!

[calf.Z]

I am still interested in this topic. Can anyone describe more details about Q- or lambda-2 criterium. Can I just use postProcess -func Lamdba2 to calculate it and visualized it through paraview ?

[vidyadhar]

Originally Posted by calf.Z

I am still interested in this topic. Can anyone describe more details about Q- or lambda-2 criterium. Can I just use postProcess -func Lamdba2 to calculate it and visualized it through paraview ?

Hello Zeng,


You may find other suitable answers also.
Any way you may please look at

1.https://www.researchgate.net/post/Po...confined_flows


2. https://www.researchgate.net/post/Ho...n_Ansys_Fluent

[calf.Z]

Originally Posted by vidyadhar

Hello Zeng,


You may find other suitable answers also.
Any way you may please look at

1.https://www.researchgate.net/post/Po...confined_flows


2. https://www.researchgate.net/post/Ho...n_Ansys_Fluent

Thank you for the valuable information!