[Momo1805]

Hey there,

can someone help me how to use the dieselFoam solver in the latest version of OF 30?? I downloaded the ext version so I have the tutorial and all the set ups but I can't the solver to work!

Thanks for your help!

[wyldckat]

Quick answer: Read this thread: http://www.cfd-online.com/Forums/ope...m-2-1-0-a.html - specially post #7.

[wyldckat]

Greetings Moritz,

You sent me a PM 16 days ago and only today did I finally manage to take a look into your question. I'll answer on this thread of yours, to keep things in the same topic and public.

Quoting parts of the message you sent me:

Originally Posted by Momo1805

[...] currently writing my thesis about an injection process of iso-butan with OpenFoam.

[...] I already have a partially evaporated gas mixture when I am injecting, so my question would be, is there within the sprayFoam or dieselFoam solvers a possibility to perform a multiphase injection?

OK, I'll write down the steps I've taken to figure out some of the details. The remaining details I'll leave them to you.

1. I went to the "tutorials" folder and looked at the files located inside the tutorial case "lagrangian/sprayFoam/aachenBomb":
   

   tut
   cd lagrangian/sprayFoam/aachenBomb
   cd constant
   gedit *

2. I looked at all of the opened files and saw this:
   

   //...
   
       compositionModel singlePhaseMixture;
   
       phaseChangeModel liquidEvaporationBoil;
   
   //...
       singlePhaseMixtureCoeffs
       {
           phases
           (
               liquid
               {
                   C7H16               1;
               }
           );
       }
   
       liquidEvaporationBoilCoeffs
       {
           enthalpyTransfer enthalpyDifference;
   
           activeLiquids    ( C7H16 );
       }
   
   //...

3. I then went to the Github page for the OpenFOAM 3.0.x repository: https://github.com/OpenFOAM/OpenFOAM-3.0.x/
4. Used the search box at the top of that page and searched for:
   

   compositionModel

5. Among the results were tutorial cases that used these different lines:
   

   compositionModel singlePhaseMixture;
   compositionModel singleMixtureFraction;

6. I used the search box again to look for this:
   

   singlePhaseMixture

7. After finding the main class file:
   

   src/lagrangian/intermediate/submodels/Reacting/CompositionModel/SinglePhaseMixture/SinglePhaseMixture.C

   I clicked on the link and went up two steps on the path, so that I could browse the folders. In other words, I went to this folder:
   

   src/lagrangian/intermediate/submodels/Reacting/CompositionModel

8. There I found these folders:
   

   CompositionModel
   NoComposition
   SingleMixtureFraction
   SinglePhaseMixture

9. I then went into the folder "SingleMixtureFraction".
10. And then opened the file "SingleMixtureFraction.H".
11. The description states this:
    

    Templated parcel multi-phase, multi-component class

    Therefore, this is essentially what you're looking for.
12. The initial tutorial case uses a single chemical named "C7H16".
13. From the first search, the following file has a few more details on how to use the mixture fraction model:
    

    tutorials/lagrangian/reactingParcelFoam/filter/constant/reactingCloud1Properties

Good luck! Best regards,
Bruno

[Momo1805]

Hey wyldckat,

thanks a lot for you answer! And if I want to use these composition models within sprayFoam, I just compile a new library and include the composition submodels right? Because there are per default not available in sprayFoam.

Greets

Moritz

[wyldckat]

Originally Posted by Momo1805

And if I want to use these composition models within sprayFoam, I just compile a new library and include the composition submodels right? Because there are per default not available in sprayFoam.

Quick answer: You only need to create a new library if and only if you need a different method for mixing the particles/fluids.
If you need new compositions, have a look at the tutorial cases that exist in the "tutorials/lagrangian" folder, because it contains a lot of similar cases. Have a look into the files "constant/thermo*".