[jovani]

Hello Dear Foamers,

Bellow you find a ported version of the viscoelasticFluidFoam solver for the OpenFOAM-2.1.x. The actual version found on OpenFOAM-1.6-ext do not compile in the OpenFOAM-2.1.x because some differences in the return of the dot product. The credits of this work is to João Felipe Mitre.

http://dl.dropbox.com/u/4495083/visc...FOAM-2.1.x.tgz

Obs.: Tutorial cases was not ported!

Regards,
Jovani

[ata]

Dear Jovani
Would you please upload it on sourceforg or google or ifile?
The address you have shared is not available for me.

Thanks a lot

[jovani]

It is now also available to download on:
http://sourceforge.net/projects/vffo...x.tgz/download

Regards,
Jovani

Originally Posted by ata

Dear Jovani
Would you please upload it on sourceforg or google or ifile?
The address you have shared is not available for me.

Thanks a lot

[ata]

Hi
Thanks a lot

[msrinath80]

Originally Posted by jovani

It is now also available to download on:
http://sourceforge.net/projects/vffo...x.tgz/download

Regards,
Jovani

Thanks Dr. Jovani. Great work :-) Any idea if a viscoelasticInterfoam solver is also available?

Thanks again!

[samegypt]

Dear all,
my name is Samir, it is my first time to use OpenFoam, I started reading and understanding the program structure, Kindly, I like to know, How I can embedd viscoelasticFluidFoam on OpenFOAM-2.1.x, shall I copy the files I download from http://sourceforge.net/projects/vffo...x.tgz/download to the OpenFoam directory, I am using ubuntu 12.04.

• Please let me know the steps that I can follow in order to allow me to run any viscoelastic model without getting error in using the viscoelastic library.
• One more question, is the provided code results validated and can be trusted.

thanks, and best regards.

[sita]

Dear Jovani and others,

I'm not quite sure where to post my question on this forum, so I chose to just reply to what seems to be the most active thread on viscoelasticFluidFOAM.

Up to now, I've been trying and playing around with viscoelasticFluidFOAM, to get familiar with it. Everything seems to work fine, at least for steady state cases, so now I'm getting more confident and I'd like to proceed to unsteady cases, in particular, a 4:1 contraction at high Weissenberg numbers, using a linear simplified PTT model (in fact, I'm trying to reproduce results of Afonso et al., J. Fluid Mech. (2011), vol. 677, pp. 272-304).

In general it's not a very good idea to use stabilising techniques like DEVSS in unsteady flows, as in this case DEVSS just comes down to adding a lot of artificial diffusion to your problem, which makes it less accurate. So now I'm wondering: how can I "turn off" DEVSS, or at least reduce the value of kappa, in viscoelasticFluidFOAM?

Thanks in advance for your reply,

Regards,

Sita

P. S. I already tried a simulation at Wi = 100 with the code as it is, so with DEVSS. This gives me results that are very different from the results of Afonso et al. (much smaller corner vortices, no time-dependence and no asymmetry whatsoever).
By the way, Afonso et al. use the log-conformation tensor approach, which also may improve accuracy, so maybe it's just not fair to compare my results with theirs.

[jovani]

Originally Posted by sita

Dear Jovani and others,

I'm not quite sure where to post my question on this forum, so I chose to just reply to what seems to be the most active thread on viscoelasticFluidFOAM.

Up to now, I've been trying and playing around with viscoelasticFluidFOAM, to get familiar with it. Everything seems to work fine, at least for steady state cases, so now I'm getting more confident and I'd like to proceed to unsteady cases, in particular, a 4:1 contraction at high Weissenberg numbers, using a linear simplified PTT model (in fact, I'm trying to reproduce results of Afonso et al., J. Fluid Mech. (2011), vol. 677, pp. 272-304).

In general it's not a very good idea to use stabilising techniques like DEVSS in unsteady flows, as in this case DEVSS just comes down to adding a lot of artificial diffusion to your problem, which makes it less accurate. So now I'm wondering: how can I "turn off" DEVSS, or at least reduce the value of kappa, in viscoelasticFluidFOAM?

Thanks in advance for your reply,

Regards,

Sita

P. S. I already tried a simulation at Wi = 100 with the code as it is, so with DEVSS. This gives me results that are very different from the results of Afonso et al. (much smaller corner vortices, no time-dependence and no asymmetry whatsoever).
By the way, Afonso et al. use the log-conformation tensor approach, which also may improve accuracy, so maybe it's just not fair to compare my results with theirs.

Hello dear Sita,

There is an old post where you find some hints about transient simulation using the viscoelasticFluidFoam solver:
http://www.cfd-online.com/Forums/ope...fluidfoam.html

To turn off the stabilising technique used in the solver go to the main file of the viscoelastc model you want and do the etaPEff = 0 in the divTau() funtion or take out the laplacian contributions in that terms that use etaPEff. I think log-conformation formulation do not improve accuracy, but just stabilize for HWNP.

Regards,
Jovani

[sita]

Great, thanks a lot, I'll try this and see what happens.

[amin144]

Hi dear Foamers
Some modelss like "Geuisekess" use 4 modes for solving cases.
If I want use single mode what should I do?
Is it enough to put zero for viscoelastic properties for 3 useless modes?

Thanks very much

[desert_1250]

ok dear Amin,

just open the viscoelasticProperties of Giesekus Case and remove second,third and fourth modes on it.

Kind Regards
______________
Rasoul

[sandipd]

Hiiii,

I am sandip. I am working with OpenFoam 2.0.1 (with Ubuntu 10.04), I am facing difficulty to install the ViscoelasticFluidFoam solver. Anybody, pls tell me what commands i need to follow..

thanks,

Sandip.

[ata]

Hi
Would you please explain the problem by details?

[sandipd]

Hi ata,
Thanks for your reply..

While installing ViscoelasticFluidFoam, I used following commands -

cd src/transportModels/viscoelastic/ wmake libso && cd -
cd applications/solvers/viscoelastic/viscoelasticFluidFoam/ wmake && cd -

and I got the following error -


root@sandip-desktop:/home/sandip/viscoelasticFluidFoam-1.0-OpenFOAM-2.1.x/src/transportModels/viscoelastic# wmake libso && cd -

'/opt/openfoam201/platforms/linux64GccDPOpt/lib/libviscoelasticTransportModels.so' is up to date.
and then -


sandip@sandip-desktop:~/viscoelasticFluidFoam-1.0-OpenFOAM-2.1.x/applications/solvers/viscoelastic/viscoelasticFluidFoam$ wmake && cd -

touch: cannot touch `Make/linux64GccDPOpt/dontIncludeDeps': Permission denied
SOURCE=viscoelasticFluidFoam.C ; g++ -m64 -Dlinux64 -DWM_DP -Wall -Wextra -Wno-unused-parameter -Wold-style-cast -Wnon-virtual-dtor -O3 -DNoRepository -ftemplate-depth-100 -I/opt/openfoam211/src/finiteVolume/lnInclude -I/opt/openfoam211/src/transportModels/viscoelastic/lnInclude -I/opt/openfoam211/src/meshTools/lnInclude -IlnInclude -I. -I/opt/openfoam211/src/OpenFOAM/lnInclude -I/opt/openfoam211/src/OSspecific/POSIX/lnInclude -fPIC -c $SOURCE -o Make/linux64GccDPOpt/viscoelasticFluidFoam.o
viscoelasticFluidFoam.C:37:31: error: viscoelasticModel.H: No such file or directory
In file included from viscoelasticFluidFoam.C:48:
createFields.H: In function ‘int main(int, char**)’:
createFields.H:37: error: ‘viscoelasticModel’ was not declared in this scope
createFields.H:37: error: expected ‘;’ before ‘visco’
viscoelasticFluidFoam.C:76: error: ‘visco’ was not declared in this scope
/opt/openfoam211/src/finiteVolume/lnInclude/readPISOControls.H:3: warning: unused variable ‘nOuterCorr’
/opt/openfoam211/src/finiteVolume/lnInclude/readPISOControls.H:12: warning: unused variable ‘momentumPredictor’
/opt/openfoam211/src/finiteVolume/lnInclude/readPISOControls.H:15: warning: unused variable ‘transonic’
make: *** [Make/linux64GccDPOpt/viscoelasticFluidFoam.o] Error 1

Please suggest me what exact steps (commands), i need to follow.

regards,

Sandip

[ata]

Hi
It seems you have not permission. Try as root user.

[sandipd]

hii,

I agree, that I have to try it out with root user but is it with same commands ? or what exactly i need to follow ?

[ata]

Hi
As I know, yes it is with the same command.

[amin144]

Hi Dear FOAMERS

I installed ubuntu 12.04.
And after installed OF 2.1.1 and paraFoam.
They worked already. Now I want to add viscoelatic solver.
I Download it and placed in 'RUN' folder in 'home/OpenFOAM/user/RUN'
I extracted files and then went to address of files in terminal window
and ran: "wmake all"

It do a lot of works and for examples makes a folder named platform in its location.
but finally it say(some of last lines):


make[3]: Leaving directory `/home/amin/OpenFOAM/amin-2.1.1/tutorials/viscoelastic/viscoelasticFluidFoam'
make[2]: Leaving directory `/home/amin/OpenFOAM/amin-2.1.1/tutorials/viscoelastic'
make[1]: Leaving directory `/home/amin/OpenFOAM/amin-2.1.1/tutorials'
make: Target `application' not remade because of errors.

What's the matter? What should I do?

[sandipd]

Hi Foamers,
I followed this procedure and it is working fine nw -

1) The ported version of the viscoelasticFluidFoam solver downloaded from - http://sourceforge.net/projects/vffof21x/. And then extracted to /user/home/ folder. It had 3 directories and 1 file inside, which needs to put into the right place of openfoam dir. Mainly, the 'src' directory need to be in the right place because the compilation of the solver search for this inside src/transportModels, i.e. -

a) Copied 'src/transportModels/viscoelastic/' directory to 'opt/openfoam201/src/transportModel' directory.
b) Copied 'applications/solvers/viscoelastic/viscoelasticFluidFoam/' directory to 'opt/openfoam201/solver' directory.
c) Copied 'tutorials/viscoelastic' directory to 'opt/openfoam201/tutorials' directory.
d) Copied the file 'wmakeViscoelasticFluidFoam' to 'opt/openfoam201/wmake' directory.

2) The source with system files and compilation done with -

a) The source file linking to the solver directory can be generated by -
'cd opt/openfoam201/src/transport models/viscoelastic/&& wmake libso && cd -'

b) The solver directory need to be compile, and it can be done by -
'cd opt/openfoam201/applications/solvers/viscoelastic/viscoelasticFluidFoam/ && wmake && cd -'

c) The recompilation of Openfoam directory was needed, and it is done by -
'cd opt/openfoam201$ ./Allwmake

Note : It will recompile whole openfoam directory (including viscoelasticFluidFoam) and end up
with - '/opt/openfoam201/platforms/linux64GccDPOpt/bin/viscoelasticFluidFoam' is up to date.

hence, it is done..!!!

[amin144]

Originally Posted by sandipd

Hi Foamers,
I followed this procedure and it is working fine nw -

1) The ported version of the viscoelasticFluidFoam solver downloaded from - http://sourceforge.net/projects/vffof21x/. And then extracted to /user/home/ folder. It had 3 directories and 1 file inside, which needs to put into the right place of openfoam dir. Mainly, the 'src' directory need to be in the right place because the compilation of the solver search for this inside src/transportModels, i.e. -

a) Copied 'src/transportModels/viscoelastic/' directory to 'opt/openfoam201/src/transportModel' directory.
b) Copied 'applications/solvers/viscoelastic/viscoelasticFluidFoam/' directory to 'opt/openfoam201/solver' directory.
c) Copied 'tutorials/viscoelastic' directory to 'opt/openfoam201/tutorials' directory.
d) Copied the file 'wmakeViscoelasticFluidFoam' to 'opt/openfoam201/wmake' directory.

2) The source with system files and compilation done with -

a) The source file linking to the solver directory can be generated by -
'cd opt/openfoam201/src/transport models/viscoelastic/&& wmake libso && cd -'

b) The solver directory need to be compile, and it can be done by -
'cd opt/openfoam201/applications/solvers/viscoelastic/viscoelasticFluidFoam/ && wmake && cd -'

c) The recompilation of Openfoam directory was needed, and it is done by -
'cd opt/openfoam201$ ./Allwmake

Note : It will recompile whole openfoam directory (including viscoelasticFluidFoam) and end up
with - '/opt/openfoam201/platforms/linux64GccDPOpt/bin/viscoelasticFluidFoam' is up to date.

hence, it is done..!!!

Thanks very much dear sandip
I done step 1
(Note for beginner user like me: it should be in root login mode)
But when I go to do step 2 terminal say me: "wmake: command not found"
But wmake exist in other user which is not root
I'm so confused!!!

Note: My openFOAM version is 2.1.1 not 2.0.1 and I corrected this number in codes