[Uyan]

Hi,

I would like to analyse my LES simulation results using PODsolver in foam-extend-3.1.

On tutorial cases there are eigen values of the scalar T (TPOD1) and TPODeconstruct field, in 0 directory.

So my problem : Is there a way in OpenFOAM to generate these files, or if not how do i generate those files for initial condition.

Thank you.

[eaglemckenna]

Hi
I am looking to POD for reduced order modeling of aircraft compartments - I have created a code with matlab that works for RANs simulations, however I would like to investigate the POD tool in foam extend. I am also having problems getting it to work - if you have had any subsequent success please let me know.
regards
gowain

[Uyan]

I am also stuck getting it to work.

However i know there are two other utilities called scalarSnapshots and vectorSnapshots to create initial snapshots.

However beyond that i am stuck on identifying POD modes on different time steps.

By the way did you decompose your OpenFOAM unstructured velocity field data using a POD matlab code?

[alib022]

Hello everyone,

I know this is a kinda old post, but I was wondering if you guys figured out how to generate the snapshots?

I am trying to use the 1DPODsin example and generate the snapshots. I removed the excising snapshots and ran scalarSnaoshots and I get this error

Error in `scalarSnapshots': double free or corruption (out): 0x00007ffe8729c050 ***


I am also wondering if you guys aware of any development for POD on NS?

Thanks

[eaglemckenna]

Hi guys,
I have abandoned the built in POD with openF0am long ago, have moved to MATLAB and ANSYS where I have written my own codes and a unique framework to bypass a Galerkin projection.
So reduced order modelling with the POD is my expertise, I am a researcher, if there is anything I can help you out with let me know the problem I would be happy to help.

[alib022]

Hey Gowain,

That's awesome! ok first of all congrats for pulling this out.
After that. I have to write my codes in open source tools and now my next step is POD.

I was wondering if there is anyway that you can share the code then I can write a version using OpenFOAM and Octave?

If not, do you have any publication, report or anything that I can start developing based on your work?

Thanks
Ali

[ahmet]

Is there any progress in this issue?

I am getting the error @alib022 on tutorial files in foam-extend-3.2 too.

[giovastabile]

I have successufully implemented POD-Galerkin methods inside foam-extend 3.2 and OpenFoam 2.4.0. With OpenFoam foam-extend I used its own eigenvalue solver with OpenFoam 2.4.0 I linked OpenFoam with Eigen that is a fast and light c++ eigenvalue solver. If you need any other tip I can provide you some more informations. Soon I will be able also to provide you some articles about the topic. At the moment they are still under review.

[ahmet]

I really want to know anything about POD or your related studies @giovastabile. Maybe you would get first cite to your paper

[alib022]

Originally Posted by giovastabile

I have successufully implemented POD-Galerkin methods inside foam-extend 3.2 and OpenFoam 2.4.0. With OpenFoam foam-extend I used its own eigenvalue solver with OpenFoam 2.4.0 I linked OpenFoam with Eigen that is a fast and light c++ eigenvalue solver. If you need any other tip I can provide you some more informations. Soon I will be able also to provide you some articles about the topic. At the moment they are still under review.

@giovastabile, congratulations
Please share your paper, possibly your code here. I am still actively using POD, and your code will be a big help.

Looking forward to read your paper.

[giovastabile]

Regarding the paper I'll be able to share it in few days. We will soon share also the code but it will take some months. All the documentation needs to be properly written.

[alib022]

Originally Posted by giovastabile

Regarding the paper I'll be able to share it in few days. We will soon share also the code but it will take some months. All the documentation needs to be properly written.

Perfect. Looking forward to read your paper

[giovastabile]

Below you can find my paper. If you need explanation or tip about the technical implementation in OpenFoam please let me know. Also if you have any comment don't hesitate to contact me.

BR,

Giovanni

The link is:
https://arxiv.org/abs/1701.03424

[pbachant]

Originally Posted by giovastabile

Regarding the paper I'll be able to share it in few days. We will soon share also the code but it will take some months. All the documentation needs to be properly written.

If you put it up now, others may help you write the documentation!

[giovastabile]

I'm sorry but I cannot release the routines without a proper documentation and a quality check. I'm sorry but I'm working within an European research project and there some conditions that need to be fulfilled before releasing the software. I hope that in some weeks I'll be able to release at least the part to compute the POD modes and later the part for the generation of the Reduced Order Model.

[muhammss]

Have you consider for the release of your codes yet?

[giovastabile]

I will soon release the part doing the POD decomposition. For the part regarding the Galerkin projection, it will take some time.

Giovanni

[muhammss]

Great, just let us know here on the group once you release it

[muhammss]

Dear Giovann,

Any updates on the release of your tool?
Bye the way, i am Trond Kvamsdal PhD student at NTNU

regards,
salman

[giovastabile]

Dear Salman,

I'm working right now to the first release of the code. I suppose in few weeks (two maximum three) we will come out with the first release. I'll keep you informed. Take my regards to Trond Kvamsdal.

Giovanni