[massive_turbulence]

I tried using the same command lines with the kivaTest similar to the cavity example in icoFoam:

blockMesh,
icoFoam,
paraFoam,

but blockMesh doesn't seem to work for generating a polymesh for the kiva example, any suggestions?

[wyldckat]

Greetings Andrew,

I've finished just now writing the FAQ regarding this, namely in the section How to run the tutorials in OpenFOAM?: http://openfoamwiki.net/index.php/FA...in_OpenFOAM.3F

Best regards,
Bruno

[massive_turbulence]

Originally Posted by wyldckat

Greetings Andrew,

I've finished just now writing the FAQ regarding this, namely in the section How to run the tutorials in OpenFOAM?: http://openfoamwiki.net/index.php/FA...in_OpenFOAM.3F

Best regards,
Bruno

Thanks Bruno,

According to the engineFoam Allrun file then I guess it's just

kivaToFoam
engineFoam
paraFoam

???

[wyldckat]

Hi Andrew,

Originally Posted by massive_turbulence

According to the engineFoam Allrun file then I guess it's just

kivaToFoam
engineFoam
paraFoam

???

What? No! That's not enough!
The Allrun script located at "combustion/engineFoam/kivaTest" has got a lot more code than just that! As explained on the wiki, simply run:

./Allrun

Then you can run:

paraFoam

If that doesn't work, then I need more information:

1. Which OpenFOAM version are you using?
2. How and from where did you copy the tutorial case?
3. Why can't you use the Allrun script?

... Anyway, the simplified version is this:

kivaToFoam -file otape17

cp system/controlDict.1st system/controlDict
engineFoam

cp system/controlDict.2nd system/controlDict
engineFoam

paraFoam

Best regards,
Bruno

[massive_turbulence]

Originally Posted by wyldckat

Hi Andrew,


What? No! That's not enough!
The Allrun script located at "combustion/engineFoam/kivaTest" has got a lot more code than just that! As explained on the wiki, simply run:

./Allrun

Then you can run:

paraFoam

If that doesn't work, then I need more information:

1. Which OpenFOAM version are you using?
2. How and from where did you copy the tutorial case?
3. Why can't you use the Allrun script?

... Anyway, the simplified version is this:

kivaToFoam -file otape17

cp system/controlDict.1st system/controlDict
engineFoam

cp system/controlDict.2nd system/controlDict
engineFoam

paraFoam

Best regards,
Bruno

1. I tried doing that (my first reply), worked fine, I'm using 2.3.0 on Ubuntu. I'll try your way too.

2. I used the command line in the home/user-2.3.0 directory
cp -r $FOAM_TUTORIALS $FOAM_RUN

3. I'll try the Allrun script too?

[wyldckat]

Quick answer - I don't understand why the confusion You can simply run it like this:

cd combustion/engineFoam/kivaTest
./Allrun

[kaveh19]

Hi guys
how can i implement combustion's product in kivaTest? I mean somethings like EGR

[massive_turbulence]

Originally Posted by kaveh19

Hi guys
how can i implement combustion's product in kivaTest? I mean somethings like EGR

You mean an EGR valve. I suppose you would first begin by creating your own mesh, which would need an intake manifold along with the combustion chamber and exhaust manifold.

Another idea would be to run one simulation with KIVA to find the final solution to all the output variables, seeing what remains and what not ( CO2, combustable gases etc) and then take those variables and run the same KIVA test again PLUS the old parameters for oxygen and fuel. I'm guessing that would come close to something like what you need.

EGR test = (First Kiva output) + (First Kiva input).

Whatever isn't burned 100% and remains would be cycled into the EGR ("First Kiva output" variables ) is what I'm guessing.

[kaveh19]

massive_turbulence, thanks for your guide.
Would you mind helping me out from two below problems?
1)When I want to simulate a combustion by new geometry , I change the parameters of enginegeometry dictionary .But I run into incorrect result. So in your opinion for this purpose I have to create a new geometry ,mesh and etc?
2)How can I see the productions of combustion?

[massive_turbulence]

Originally Posted by kaveh19

massive_turbulence, thanks for your guide.
Would you mind helping me out from two below problems?
1)When I want to simulate a combustion by new geometry , I change the parameters of enginegeometry dictionary .But I run into incorrect result. So in your opinion for this purpose I have to create a new geometry ,mesh and etc?
2)How can I see the productions of combustion?

I'm assuming a lot for both these possible ways so I might be totally wrong, but for 1) What do you mean by incorrect result. Does your mesh not work with the check mesh function? In my opinion, I think you would need to figure out a way to remove some of the exhaust from the combustion chamber and put it back into the intake chamber. My assumption was to create a whole new mesh, although that is probably a waste of time and doing it the second way might be better.

For 2) I'm assuming that your solver shows the NOX produced somewhere in the output (KIVA supposedly does solve for pollutants) and you take a percentage of that and introduce that back into the original run. If that's not possible then sorry I can't think of another way.

[kaveh19]

thanks for your mention ,but
1) for example when I change bore to 0.086 and stroke to 0.086 the solution will not converge
2) how can i see the result of reactions or pollution in order to take them into original run?

[massive_turbulence]

Originally Posted by kaveh19

thanks for your mention ,but
1) for example when I change bore to 0.086 and stroke to 0.086 the solution will not converge
2) how can i see the result of reactions or pollution in order to take them into original run?

For 1) No idea.

For 2) It is my assumption the pollutants are in the output file.

According to wikipedia the KIVA software does solve for them; if not, it might not exist in OpenFoam.

https://en.wikipedia.org/wiki/KIVA_%28software%29


" The software predicts complex fuel and air flows as well as ignition, combustion, and pollutant-formation processes in engines."

[kaveh19]

thanks for your guide.