CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums

Search Results

Register Blogs Community New Posts Updated Threads Search

Page 1 of 2 1 2
Showing results 1 to 25 of 32
Search took 0.00 seconds. Search: Posts Made By: adambarfi
Forum: OpenFOAM Running, Solving & CFD December 26, 2017, 03:29
Replies: 475
Views: 94,857
Posted By adambarfi
So Re=1; creeping flow! I think that's a little...

So Re=1; creeping flow! I think that's a little tricky.

Did u assume the flow is steady state? If yes, it is not a concern how the outlet velocity is changing during your simulations. Just let it...
Forum: OpenFOAM Running, Solving & CFD December 25, 2017, 04:04
Replies: 475
Views: 94,857
Posted By adambarfi
Your boundary conditions seems ok to me as well...

Your boundary conditions seems ok to me as well as the fluid properties. What is the Reynolds number? How long is the length of your channel? Does the flow get fully developed though it?
How do you...
Forum: OpenFOAM Running, Solving & CFD December 25, 2017, 03:10
Replies: 475
Views: 94,857
Posted By adambarfi
Greetings, First of all, welcome to...

Greetings,

First of all, welcome to CFD-online.

Let me explain a little bit when some vortices are formed in fully developed laminar viscoelastic flow. Having corner in the cross section of a...
Forum: OpenFOAM Running, Solving & CFD February 16, 2015, 08:20
Replies: 475
Views: 94,857
Posted By adambarfi
Dear Mojtaba, If you have a non-slip...

Dear Mojtaba,

If you have a non-slip boundary conditions on your walls so you should specify a zero velocity at each wall. for example:


boundaryField
{
floor
{
type ...
Forum: OpenFOAM Running, Solving & CFD February 16, 2015, 05:39
Replies: 475
Views: 94,857
Posted By adambarfi
Dear Mojtaba, Why did you use zero gradient...

Dear Mojtaba,

Why did you use zero gradient velocity condition on your walls? can you tell me clearly what are u modeling?

you can plot the residuals or you can save them in a log file and then...
Forum: OpenFOAM Running, Solving & CFD February 14, 2015, 05:12
Replies: 475
Views: 94,857
Posted By adambarfi
Are you sure your solution is converged? it seems...

Are you sure your solution is converged? it seems that there are some problems in convergence. what are the boundary conditions?
Forum: OpenFOAM Running, Solving & CFD February 12, 2015, 14:31
Replies: 475
Views: 94,857
Posted By adambarfi
dear mojtaba, you didn't close the bracket...

dear mojtaba,

you didn't close the bracket in top_wall boundary:


p

dimensions [0 2 -2 0 0 0 0];

internalField uniform 0;
Forum: OpenFOAM Running, Solving & CFD December 23, 2014, 11:52
Replies: 475
Views: 94,857
Posted By adambarfi
see this post:...

see this post: http://www.cfd-online.com/Forums/openfoam-solving/57846-viscoelastic-fluid-flows-using-openfoam-solver-viscoelasticfluidfoam-10.html#post360185

Regards,
Mostafa
Forum: OpenFOAM Running, Solving & CFD November 2, 2013, 13:46
Replies: 475
Views: 94,857
Posted By adambarfi
sorry, I didn't hear about viscoelasticInterFoam...

sorry, I didn't hear about viscoelasticInterFoam before!!!! but for multiphase flows the surface tension is necessary.
Forum: OpenFOAM Running, Solving & CFD October 30, 2013, 02:21
Replies: 475
Views: 94,857
Posted By adambarfi
hi sharonyue, by Joani: Also,...

hi sharonyue,

by Joani:



Also, you can get more information in follow pdf file, pages 32-60:
http://powerlab.fsb.hr/ped/kturbo/OpenFOAM/slides/viscoelasticFluidFoam.pdf
Forum: OpenFOAM Running, Solving & CFD October 29, 2013, 22:25
Replies: 475
Views: 94,857
Posted By adambarfi
help me!!! where is the problem: Residuals are oscillating

hi everybody

I have a problem with my residuals. I added the temperature with Boussinesq assumption to viscoelasticFluidFoam solver and when I ran it the 'tau' residuals are oscillating and the...
Forum: OpenFOAM Running, Solving & CFD October 29, 2013, 22:19
Replies: 475
Views: 94,857
Posted By adambarfi
hi or more for info see...

hi




or



more for info see the below links:
Forum: OpenFOAM Running, Solving & CFD August 29, 2013, 05:31
Replies: 475
Views: 94,857
Posted By adambarfi
I mean your residuals during your solution. ...

I mean your residuals during your solution.
could you attach the log file?
Forum: OpenFOAM Running, Solving & CFD August 28, 2013, 23:46
Replies: 475
Views: 94,857
Posted By adambarfi
how about the residuals and convergence?

how about the residuals and convergence?
Forum: OpenFOAM Running, Solving & CFD August 21, 2013, 21:14
Replies: 475
Views: 94,857
Posted By adambarfi
hi I didn't hear before about BICGSTAB matrix...

hi
I didn't hear before about BICGSTAB matrix solver. go to solutionDict and look for which equation you used BICGSTAB solver. change it to a asymmetric matrix solver.
it had guid you and had...
Forum: OpenFOAM Running, Solving & CFD August 21, 2013, 04:44
Replies: 475
Views: 94,857
Posted By adambarfi
what do you mean of 'it doesn't work'? any...

what do you mean of 'it doesn't work'?
any error?
Forum: OpenFOAM Running, Solving & CFD August 20, 2013, 07:57
Replies: 475
Views: 94,857
Posted By adambarfi
just extract it in $WM_PROJECT_DIR and make sure...

just extract it in $WM_PROJECT_DIR and make sure that the wmakeViscoelasticFluidFoam file is exist in this directory.
then:

./wmakeViscoelasticFluidFoam
Forum: OpenFOAM Running, Solving & CFD May 12, 2013, 03:39
Replies: 475
Views: 94,857
Posted By adambarfi
Adding dissipation term to heat transfer equation of a viscoelastic fluid

Hi everybody,

I want to add the dissipation term to my T equation. I did it as follows:

dimensionedScalar kappa=(etaS+etaP)/(rho*Pr);

fvScalarMatrix TEqn
(
...
Forum: OpenFOAM Running, Solving & CFD March 21, 2013, 08:04
Replies: 475
Views: 94,857
Posted By adambarfi
I didn't exprienced in multiphase flows. but one...

I didn't exprienced in multiphase flows. but one idea is that you can define a new viscosity model. just modify an exist viscosityModel. then you can use it in transportProperties and in momentum...
Forum: OpenFOAM Running, Solving & CFD March 21, 2013, 01:35
Replies: 475
Views: 94,857
Posted By adambarfi
dear salame, viscoelasticFluidFoam just returns...

dear salame,
viscoelasticFluidFoam just returns the div(tau). so it is not a viscosity model.
if you set this solver as a base, you can modify it in a manner that could be used for multiphase...
Forum: OpenFOAM Running, Solving & CFD March 20, 2013, 03:31
Replies: 475
Views: 94,857
Posted By adambarfi
Greeting, welcome and happy your Nowruz day!!!! ...

Greeting, welcome and happy your Nowruz day!!!!

did you modify the transportModel and your new solver files so that they contain both viscoelasticFluidFoam and interFoam information???
Forum: OpenFOAM Running, Solving & CFD March 11, 2013, 10:11
Replies: 475
Views: 94,857
Posted By adambarfi
my problem was solved. The idea was: don't put...

my problem was solved.
The idea was: don't put T into the argument lists. Instead look up the T volScalarField from the "registry"!!!

thanks
Forum: OpenFOAM Running, Solving & CFD March 4, 2013, 13:46
Replies: 475
Views: 94,857
Posted By adambarfi
hi everybody again, I started it with adding...

hi everybody again,

I started it with adding a volScalarField& T to the solver and make some modifications. also, since I need gamma and T1, I added them in...
Forum: OpenFOAM Running, Solving & CFD March 4, 2013, 12:11
Replies: 475
Views: 94,857
Posted By adambarfi
Hello everybody, Is here anybody knows how...

Hello everybody,

Is here anybody knows how can I define a temperature dependent viscosity in viscoelasticFluidFoam. I before add temperature equation to the solver.
mu(T)=mu1*exp(-gamma*(T-TRef))...
Forum: OpenFOAM Running, Solving & CFD February 22, 2013, 15:21
Replies: 475
Views: 94,857
Posted By adambarfi
thank you Tushar, I've done it before and my...

thank you Tushar,
I've done it before and my problems were solved.
Showing results 1 to 25 of 32
Page 1 of 2 1 2

 
Forum Jump

All times are GMT -4. The time now is 21:56.

Contact Us - CFD Online - Privacy Statement - Top