[hjasak]

For the uninitiated (like me): I have just found out about a visualisation packaged called VisIt: http://www.llnl.gov/visit/. In Septemner 2006 News it says that a native OpenFOAM reader has been implemented.

A kind thatnk you from me to the person who did the work. Did anyone on this forum actually install/use VisIt? What is it like?

Hrv

[jdkummer]

I have used Visit, and it does an excellent job for visualization of CFD data, especially from Openfoam. If you're interested, I would be happy to send you a sampling of pictures from Visit to see some basic capabilities.

[msrinath80]

More importantly, does it support proper display of non-conformal meshes So far I have only seen OpenDX do the job nicely!

[otsuki]

Visit can display "time" of transient data on
graphic window. For the other visualisation functionality, ParaView seems to be better.

Masato

[7islands]

I agree that generally ParaView does slightly better jobs, but what I like about VisIt is its rock-stable volume rendering on Windows. Although the native reader itself still seems to need a bit of additional works especially for unstructured grids, I can count on VisIt's capability with reliability.

Oh, and the nice work attributes to Terry Jordan:
http://www.cfd-online.com/OpenFOAM_D...es/1/2844.html

Takuya

[hsieh]

Hi,

I just installed visit 1.6. Can someone write a brief steps on how to read native OpenFOAM (version 1.4) data files? Or do I need to convert the data format to VTK first?

I selected the OpenFOAM file type. I have transient data sets in several time steps. Is it possible to read the whole directory with the time step folders under it? Or do I have to read each indivisual file (U/pd/gamma)?

Thanks!

pei

[braennstroem]

Hi,

I like the simple python macro recording feature of visit, which I miss in paraview (and it does not seem to work in the next months!?). And in addition to openfoam it has readers for StarCCM+, FLUENT, Ensight and a lot other. The only disadvantage compared to paraview is the lack of exporting data for external diagram plotting... and the complete integration into openfoam like 'paraFoam'.
Fabian

[braennstroem]

me again... but it seems that reading 'native' openfoam is pretty slow!?

[deepsterblue]

Hello all,

I've modified the VisIt reader to accept variable time-step data. It's a very rough first-hack, but you're welcome to modify it as you see fit.

VisItPlugin.tar.gz

[7islands]

Hi Sandeep and all,

I just would like to let you know a status about the VisIt reader. About a month ago I passed a copy of my vtkOpenFOAMReader to a VisIt developer who read my post to the visit-users list and contacted to me. I am expecting it will take time even for him to port the reader to VisIt as he stated he is doing the work on weekend basis, but hopefully it will be a part of VisIt someday. I'll keep you posted about this.

Takuya

[braennstroem]

Hi,

as I understood the visit developer, Takuya's Reader could be implemented in the next release.

@Sandeep: nice!

Regards!
Fabian

[lin]

Hi,Sandeep,Takuya

Just a short question.I have installed some time ago,version 1.10.
As I notice that it already could open openfoam file,but have not tried yet.

Could you give a short description of the difference of your implementation with the one already in the official release?

[7islands]

Hi linzhenhua,
Stability, compatibility, performance, gzipped file support, lagrangian support, pointFiled support, builtin cell-to-point filter, OF 1.5 extended format support, etc, etc. Too many to list here.

If it helps to figure out by yourself the one I passed was a bit modified version of vtkOpenFOAMReader-20080628 posted to the native reader thread.

Takuya

[7islands]

Hi Fabian,
Unfortunately, as far as I am aware the porting task is not so trivial, as my reader depends on some features only available in the newest VTK (which is not included in VisIt yet). So I'd like to ask you to cheer him up on the visit list so that he will not give it up :-) Until then Sandeep's reader should be a good choice... Indeed the variable timestep support was one of the most wanted features also for my reader.

p.s. By the way isn't there anyone who has, or plans to write, an OpenFOAM writer? I'm also asked to provide one (if any) but I don't have any plan to implement it.

T

[lin]

Hi,Takuya
Thanks for your work.I indeed notice that you are very active in the visit mainling list.

As a normal user,I just use the build script to build visit.So for your newly implemented plugin,I do not know whether there is any instructions to build it with visit.

[braennstroem]

Hi to you both,

I am cheering off-list :-) And it sounded, that he had some problems in the beginning, but could get it done in the near future...

Fabian

[7islands]

Hi linzhenhua and Fabian,

@linzhenhua: as far as I am aware the porting task is not finished yet so it is not available anyway (sorry for this confusing story).

@Fabian: thanks! That sounds promising.

Takuya

[zeliboba]

to Sandeep:

your reader does not support compressed data, does it?

[deepsterblue]

Maxim,
Unfortunately, it doesn't accept compressed data. I don't see too much of an issue in implementing it, though. You have to interface with zlib, just like OpenFOAM. I'm sure IOobject (or something related) has details of the implementation. But yes, compressed data support would be a nice thing to have.
I'm getting a little less impressed with VisIt - it does seem to be painfully slow while rendering animated timesteps.

[prjohnston]

Dear All,

I have just downloaded VisIt 1.11.2 with a view to visualising data from OpenFOAM simulation runs. The software appears to work fine as I worked through the tutorials OK. It also works with VTK data that I generated from my OpenFOAM simulations (using foamToVTK). However, I have just no idea how to get native OpenFOAM data into VisIt.

I have checked the plugin manager and I know there is supposed to be a plugin for OpenFOAM databases active. There are also several OpenFOAM dylib files in /usr/local/src/visit/current/darwin-i386/plugins/databases.

I start VisIt in the directory in which I have just completed an OpenFOAM simulation run. The problem is I don't know which files to try and open. The manual suggests that everything is based on file extensions, but OpenFOAM does not use file extensions. The few files that I have attempted to open give error messages, usually saying there are no file extensions.

I'm sure the answer to my problem is quite straight forward, I just can't see what it is. Any thoughts would be much appreciated.

Thank you,

Peter Johnston.