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Open source CFD code development, possible?

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Old   July 17, 2000, 05:40
Default Re: Open source CFD code development, possible?
  #21
Oliver Gloth
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Hello All!

We would be most happy if someone wants to contribute to our code (MOUSE). Feel free to contact us directly!
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Old   July 17, 2000, 05:47
Default Re: Open source CFD code development, possible?
  #22
vijay pargaonkar
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Hi,

If anybody has document on how to learn a already existing fortran code.(I mean for reengineering) What is the better way to do it. The learning takes a lot of time. I beleive that most of the CFD codes are in fortran. Are there visual environments for fortran. How do I get it?.

pargaonkar vijay
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Old   July 17, 2000, 09:53
Default Re: Open source CFD code development, possible?
  #23
R. Vilsmeier, O. Gloth, I. Elmahi, further members
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Dear Drs. Yazid Bindar and Jens Wyrwa, dear CFD-community,

As developers of the MOUSE project, we thank you very much for your interest in this software project. In fact, we very much hope to find this interest in the community and contributions are very welcome.

One of MOUSE's goals is to avoid double developments. Please understand however, that it is not possible to be very on time with all younger code-modules, since a ''public'' version must, upon our understanding, be more reliable than a research code is in the beginning of its development.

Concerning the intended developments stated in the discoussion of this post, we thus like to give an overview of current activities at IVG / University Duisburg:

1) Reactive flows / combustion:

A reactive compressible / weak compressible module has been developped although not published online yet. It is based on an extension of the Roe-Turkel method to multispecies flows. Turkel-type preconditioning and dual time stepping are included for low Mach-number flows. Source terms are treated implicitly to avoid stiffnes asociated with complex chemistry. Probably to be released in one of the next updates. Chemkin package is required.

2) Flows in porous media:

We've started a development with special emphasis on discontinuous porous media flows with material interfaces. Porous media flows rely on Darcy-type equations and an elliptic solver (not yet MG). A porous extension package could be released within some months, if the interest of the community is high. Otherwise, the development remains coupled with the discontinuity extension package, see below.

--------------- Not mentioned in the above discoussion of this post, I may however state some more points of current developments from our side. These are:

3) It is really time for a full 3-D version with about same handling as the known 2-D version. For those having developed extensions for the 2-D versions, there will be some upgrade hints. Release expected for late autumn 2000.

4) As mentioned in 2), we're developing a basic discontinuity extension package. This enables material interfaces, shocks or other discontinuities to be treated within the field solutions. The method is based on a local level set formulation. Alpha-version looks promissing. Current work in this topic is on full conservation and on getting rid of some topological restrictions of the level set version.

5) Some new extensions towards automatic hybrid grid generation. Look good but will take a little while to find the way into the public release.

6) Some applied projects.

----------------

Any suggestions, contributions or discoussions are very welcome. Please feel free to contact us.

Best regards and happy computing,

the MOUSE-team.
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Old   July 17, 2000, 11:41
Default Re: Open source CFD code development, possible?
  #24
Pei-Ying Hsieh
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Hi,

I am wondering if VOF development is planned in the MOUSE project. Thanks!

Pei-Ying
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Old   July 17, 2000, 11:51
Default Re: VOF in MOUSE
  #25
R. Vilsmeier
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Dear Dr. Pei Ying,

concerning your VOF-question: No, we do not intend to include exactly this method. The method we use is level set based, but there will be a full conservation extension, if this is the concern. However, not all problems are solved with respect to this method (which we consider new) yet.

Thanks for asking and best regards,

Roland
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Old   July 17, 2000, 12:27
Default Re: VOF in MOUSE
  #26
Pei-Ying Hsieh
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Dear Roland:

I am interested in free surface flow with strong surface tension effect. I do not have any experience with level set method. Does level set takes surface tension into account? I have seen papers discussing combined VOF/Level set method. I am curious if it is suitable for strong surface tension flow? Thanks!

Pei-Ying
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Old   July 17, 2000, 12:53
Default Re: VOF in MOUSE
  #27
R. Vilsmeier
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Dear Pei-Ying,

well, the original post gets somehow a little deep in the replies, OK, one more from our side:

We did not consider surface tension or a similar term yet, but I'm not affraid of it. Consider, that material interfaces are usually based on pressure equality in larger scales, there will now just be an additional pressure difference term on the interface. For this, the surface curvature will be required, if I'm correct. This information is however relatively easy to obtain from the scalar level set function. I thus see no essential problem to include this effect, but doing things is something else than just thinking how it could be done.

Concerning the combined VOF/level-set papers, you probably mean the work of R. Klein, correct? If so, our approach is somehow similar, but intended to extend to all grid types and arbitrary conservation problems on interfaces, also other than material interfaces.

Please tell me, what exactly you're willing to compute and we'll give it a deeper thought.

Thanks for asking,

Roland V.
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Old   July 18, 2000, 00:18
Default Re: Open source CFD code development, possible?
  #28
yazid bindar
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Dear Mouse Project Team

I am glad to read your open response about your MOUSE project.

If you are willing to make your Mouse CFD code development to be an open code CFD development, I am willing to contribute on the basis of my experience.

I have been working in developing CFD code for last sevent years. The CFD code that I worked with features -3D finite volume method (Patankar follower) -3D cartesian grid -3D imcompresible flow (Favre average) -3D k/e turbulent model -3D diffusion combustion model (PDF Concept) -3D radiative heat tranfer model, no scattering -3D conduction heat transfer in solid -2D flow in porous media ranging from Darcy's to non-Darcy's regimes, being extended to 3D -No GUI -simple solver (line by line method) -No multigrid

Let's me hear from you how to start the implementation of the open CFD source code development

Sincerely

Yazid Bindar
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