The comparison of ANSYS/Fluent and OpenFOAM 2

[Nacionarg]

Besides the other comments below, I would like to know: 1) Comparison with experimental data (otherwise I have no reference as to which one was more accurate) 2) Total computational time 3) Software cost (this one is my favorite).

[moulin]

looks like a difference in the outflow boundary condition

[kdr]

Some obvious conclusions:
1) contrary to OF's, ANSYS's simulation seems to have some turbulence on the inlet.
2) doesn't ANSYS fluid have lower viscosity? It displays sharper pickup of momentum (more intensive ripples...) and a higher dissipation afterwards (straight line after 150).
3) The outlet BC seems wrong in ANSYS... Do you see that green buildup at the outlet corners?

Could anyone comment on that please? I'm studying and I'd really like to know the reasons behind this.

[lucasgasparino]

Nice, but it's lacking some important info: did you use the same mesh? What about the time advancing scheme? Is it an immersed body method, or you're using dynamic meshes?
Maybe do a more standard comparison, with fixed mesh size and 3 refinement levels, so we can really see what's going on.

[helloworld]

Absolutely beautiful graphics. Mindboggling number of hours must have gone into learning and preparing all that stuff!!! Has anyone attempted to compare predictions with reality, to see which of these 2 products "wins" ?

[warast]

could you make the openfoam case public, please ?

[pranab]

Good video. 
I have a question. There seems to be difference at the outflow (right end) boundary between the two codes.  Fluent seems to have periodic BC (not sure) while OpenFOAM looks to have convective BC. Please explain.

[sercro]

This is an awesome model and results presentation. Did you use exactly the same models on both codes? Why do you think there is such a noticeable diff near domain boundaries?

[DaylightDigital]

Is it jut me or is this wind turbine running in reverse (both the flow direction and the direction of rotation)?

[aldiasbahatmaka]

this video is interesting.
what solver did you use? Is it in MRF or sliding mesh?
and could you share with us how the step did you make this simulation?

Best regards,
Aldias

[PYRAMIDHEAD]

1:45 Observe the unphysical airflow at the boundaries & outlet of wind tunnel in Ansys fluent . It is not present in Open foam.

Probably it has to do with coarse mesh or type of boundary conditions applied at the wind tunnel boundaries

[MAHMUDEMAM]

It can be seen that BCs are different. Also the discretization is more diffusive in the OF case.

It is possible to exactly replicate the fluent results if you exactly replicate the schemes, solvers, and all other settigs

[EduardoLima-mgrf]

No mention of numerical schemes, boundary conditions, experimental data, solvers. This is no comparison, this is just fancy plots

[richardyang]

Hi, how you make this video? which software?

[abylkaiyromar]

Hello, could you describe how you visualised the vorticity in Fluent in details, thanks

[malloott]

Yeah Outlet BC on Ansys definitely has a different setting, the back flow/pressure seems to explain the fast stabilizing of flow in the Ansys example.

To compare it is very important the outlet conditions are the same, well made video nonetheless!

[manueltenorio]

Hello, nice videos, how do you put the graphic and the video together? Thanks.

[madtscientist]

I wish I could tell you how INEFFICIENT it is but by doing so I would be telling you my idea on wi. Flow dynamics

[nkmmas]

Whats a programme can build dynamic charts?

[muhammadchoudhry]

how do you plot the graph in OpenFOAM velocity over time, I am using ParaView but struggling? can anyone help!
?