[danz]

Hi Tobi!

I have my flamelet library(using CANTERA) now and I want to interpolate the temperatue over the mixture fraction and stoichiomertic scalar dissipation rate. My question is how do you interpolate the mixture fraction grid since you have different discretization of the flamelets (One have more discretization points near the exctinction).
In libOpenSmoke, I can just see the stoichiomertic scalar dissipation rate interpolation.

Thanks.

Best,

Danz

[Tobi]

Originally Posted by danz

Hi Tobi!

I have my flamelet library(using CANTERA) now and I want to interpolate the temperatue over the mixture fraction and stoichiomertic scalar dissipation rate. My question is how do you interpolate the mixture fraction grid since you have different discretization of the flamelets (One have more discretization points near the exctinction).
In libOpenSmoke, I can just see the stoichiomertic scalar dissipation rate interpolation.

Thanks.

Best,

Danz

This is a area-weighted interpolation function! Have a look into the flamelet basic cpp file!

[Tobi]

Hi all,

I am very happy to tell everybody that I build the flameletPisoFoam solver.
The solver is running and in the attachment are the first results.

At the moment I am running the Sandia-Flame tutorial and hope that the case is running without problems.

If everything is working fine, I ll make a validation with the measurement data files and let you know how accurate the solver is working.


Regards,
Happy Tobi

[Tobi]

Hi all,

I think its done.
The solver is running without problems (attachment).
I ll let the testcase run until I get a steady-state solution and after that I am going to test the mixture fraction variance transport equation. At the beginning I had problems with that so I used the algebraic equation at the moment but it seems to work


Next steps:

• Calculating till 1 second
• Recalculating till 1 second with mixture fraction transport equation
• Start calculation from steady-state solution (flameletSimpleFoam)
• Compare steady and unsteady solution
• Compare unsteady solution with measurements
• Clean and upload the new solver + tutorial to the 2.2.x flamelet model on github

Tobi

[babakflame]

Hi Tobi
Congratulations.
Can I ask how did you solve the problem of division by zero in pressure?


Bobi

[Tobi]

Hi all,

• flameletPisoFoam solver runs stable and gives better residual as the flameletSimpleFoam solver
• Since yesterday I am working on the Validation of that solver and the comparision with the SIMPLE algo too. There is a Problem with my flameletSimpleFoam solver,... I dont know why the Validation with that solver is so bad (I did that Validation three times, with 1.7x, 2.1.x and 2.2.x )
  I think I made a mistake yesterday (too tired)
• I ll upload the flameletPisoFoam solver hence everything is working without Problems

@Bobi:

I am not sure why I always get Problems building the transient solver. The only change is the PISO algo instead of the PIMPLE.

But at least I can not say if the solver works correct, since I don t get the validation.

[immortality]

Hi
whree's the solver?

[Tobi]

I ll upload the solver here: github.com/shor-ty/flameletModel 2.2.x

But first of all I have to be sure that the solver is working correct. It makes no sence to share this solver without any Argument that it s calculating the values correct.


Tobi

[Tobi]

Hi all,

first results are avaiable.
I made the validation with the following profiles:

- axial
- xD = 20
- xD = 40
- xD = 60

The solutions are very good. It seems that in the steady state flame area the flameltSimpleFoam gives a more accurate solution than the PISO foam. In some graphics you could see that the piso foam solver is getting a more accurate result.

At least I would say that both solvers are working fine at free-stream velocity flames.
If someone has an validation case for a complexed (twisted?) flow please let me know.


In a few days I ll upload everything.
Good night.

[Tobi]

Hi all,
see attachment!
Further information are comming.

[Tobi]

Hi all,

here we go:

https://github.com/shor-ty/flameletModel-2.2.x

I updated my github and now it contains the new flameletPisoFoam solver + tutorial. Hope that I upated my github correct (not tested).

If you have problems - let me know.


Here is the validation:

http://www.holzmann-cfd.de/validatio...dationPiso.pdf

-------------------
2014-12-04 - Warning: The git repository was deleted. For the latest mirror repository, go to post #407

[immortality]

how much is its volume?my browser is continuing to download.now is 25meg!

[Tobi]

Its volume is 222 MB ... thats coused by the flamelet libs.

I ll try to link it to decrease the volume.

Tobi

[immortality]

wow,then that was good that I discontinued it!

[Tobi]

Do you have a limitation of traffic ?

I updated my github and now the tool is about 77MB

Hope that is better - thanks for your hint!

Tobi

[babakflame]

Greetings to all

Does anybody else experienced problem with downloading Tobi code?
My Internet is 1 Mb/s ; however my download speed for pisofoamflamelet code is just 1 Kb/s
For God's sake, WHY?????

@Tobi

Thanks buddy for all you have done for flamelet researchers.
Did you take a look at my code?

Regards
Bobi

[wyldckat]

Greetings to all!

Given Bobi's predicament, I've created a mirror repository at http://repo.or.cz/w/flameletModel-2.2.x.git

To git clone from it, use either one of the following commands:

• git clone git://repo.or.cz/flameletModel-2.2.x.git

• git clone http://repo.or.cz/r/flameletModel-2.2.x.git

For those who don't have git, use one of the snapshot links from here: http://repo.or.cz/w/flameletModel-2.2.x.git/tree

Best regards,
Bruno

-------------------
2014-12-04 - Warning: This repository was deleted. For the latest mirror repository, go to post #414

[babakflame]

Many Thanks to Bruno

[Tobi]

I ll have a look at that Problem today evening!

I was offline for a while (many things to do )

[babakflame]

Hi Tobi
During Compiling flamelet model2.2.x , I confronted this error:

babak@babak-System:~/OpenFOAM/babak-2.2.x/flameletModel-2.2.x/applications/solvers/combustion/flameletSimpleFoam$ wmake
options:16:12: warning: backslash and newline separated by space [enabled by default]
linux64GccDPOpt/options:6: *** missing separator.  Stop.
wmake error: file 'Make/linux64GccDPOpt/objectFiles' could not be created in /home/babak/OpenFOAM/babak-2.2.x/flameletModel-2.2.x/applications/solvers/combustion/flameletSimpleFoam

Would you please help me

The libraries compiled successfully however it seems there is problem with both solvers compilation.

Regards