[amuzeshi]

Hello there,

In brief, to solve the problem of flow over cylinder at Re = 40, the use of pimpleFoam reaches steady solution, but using solids4Foam does not (As a representative indication, screenshots of the latest time step of the both is attached. Compare the length of effected downstream between the two, where it is considerably longer in pimpleFoam solution).

Also, using pimpleFoam to solve this with residual control set to 1e-6 for p and U, gives a good estimation for drag coeff.

However solving this problem with solids4Foam and pimpleFluid as fluid model, after some time, ends up with a situation where the initial residual of pressure stalls in a big value (0.9) even for 14000 number of outer correctors (And therefore it does not converge to the prescribed residual).


Can someone comment on this issue?

Regards,
Ali

[Daniel_Khazaei]

Dear Ali,

Which version of foam-extend did you use to test your case?
Would you please re-run your case with bugfix-pimpleFluid branch of solids4Foam and let me know whether the issue is resolved or not?

Regards,
D. Khazaei

[amuzeshi]

Dear Daniel
I use foam-extend-4.0 and solids4foam-release-0a631d27b6c4 (if it is meaningful to you !?).
Right now, I've turned this issue around by using a lot of correctors, namely:

nCorrectors      10;
nNonOrthogonalCorrectors      50;

Could you tell me if this fix is also merged into the master branch?

Best Regards,
Ali

[Daniel_Khazaei]

Originally Posted by amuzeshi

Dear Daniel
I use foam-extend-4.0 and solids4foam-release-0a631d27b6c4 (if it is meaningful to you !?).
Right now, I've turned this issue around by using a lot of correctors, namely:

nCorrectors      10;
nNonOrthogonalCorrectors      50;

Could you tell me if this fix is also merged into the master branch?

Best Regards,
Ali

I needed to know the foam-extend version as the pimpleFluid code uses a few pre-processor directives which are version dependent.
No, the fix is not yet merged into the master branch as I needed to know if it actually resolve this issue before putting in a pull request.

Can you checkout the bugfix-pimpleFluid branch and recompile solids4Foam?
Then, I need you to run the pimpleFluid case with the identical settings as pimpleFoam and compare the result!

If the solutions are identical, then this can be merged into development branch and hopefully you can see the changes on master branch after a while.

[amuzeshi]

I try to dig into it as soon as possible.

[amuzeshi]

Dear Daniel,

Is it possible to have distinct branches of solids4Foam on one Desktop - for example master branch and pimple corrected branch ?
As there is no etc/bashrc file, it seems it is not possible, right?

Regards,
Ali

[Daniel_Khazaei]

Originally Posted by amuzeshi

Dear Daniel,

Is it possible to have distinct branches of solids4Foam on one Desktop - for example master branch and pimple corrected branch ?
As there is no etc/bashrc file, it seems it is not possible, right?

Regards,
Ali

Hi, I think it can be done but it doesn't worth the hassle!

If you have used git to clone the repository, then it is as simple as using git checkout to move between different branches.
I just need you to test your case with the new corrected pimpleFluid model and confirm that it works just like pimpleFoam. I have already checked with foam-extend default tutorial and everything seems normal to me.

Then you can come back to the main branch and recompile the toolkit.

Regards,
D. Khazaei