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-   -   Depth-averaged quantities in Ansys CFD-POST (VOF simulation) (https://www.cfd-online.com/Forums/fluent-multiphase/220616-depth-averaged-quantities-ansys-cfd-post-vof-simulation.html)

 arhabib September 13, 2019 15:08

Depth-averaged quantities in Ansys CFD-POST (VOF simulation)

Hi,

I am looking for a way to display depth-averaged quantities such as depth-averaged velocity in a VOF model conducted in Fluent.
I found a thread under the EnSight forum to do it, but I'd like to use Ansys CFD-POST.

Any help will be appreciated.

 rupak504 September 14, 2019 10:27

Quote:
 Originally Posted by arhabib (Post 744663) Hi, I am looking for a way to display depth-averaged quantities such as depth-averaged velocity in a VOF model conducted in Fluent. I found a thread under the EnSight forum to do it, but I'd like to use Ansys CFD-POST. Any help will be appreciated. Thanks in advance.
Define a formula for depth-averaged velocity
Name it some new variable
calculate it

 arhabib September 14, 2019 10:35

Thanks rupak504,

To define a formula, I'll need to average or integrate in only the vertical direction. Is there a function to do so?
I found that in EnSight the function radiograph_mesh does this but what's the corresponding function in CFD-POST? I don't want to use EnSight.

Thanks

Quote:
 Originally Posted by rupak504 (Post 744687) Define a formula for depth-averaged velocity Name it some new variable calculate it

 rupak504 September 14, 2019 10:45

Quote:
 Originally Posted by arhabib (Post 744689) Thanks rupak504, To define a formula, I'll need to average or integrate in only the vertical direction. Is there a function to do so? Thanks
Define a vertical line in your domain.
Integrate the variable along that line.

 arhabib September 14, 2019 10:53

Yes, but I am looking for a 2D map of depth-averaged velocity in the entire domain. It won't be practical to define vertical lines in the entire domain.
I am thinking a function that integrates in the vertical along all mesh nodes or faces. As I said Radiograph_mesh in EnSight does this. But I'm looking for a similar function in Ansys Post.

Quote:
 Originally Posted by rupak504 (Post 744691) Define a vertical line in your domain. Integrate the variable along that line.

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