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Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

October 21, 2020, 08:11

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Well I have reported this awhile ago by email, it...

Well I have reported this awhile ago by email, it seems that the implicit loop of the solid models requires more iterations to converge when running the cases on OpenFOAM distributions. If I remember...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

March 11, 2020, 06:53

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

I think what we see here is the effect of...

I think what we see here is the effect of numerical discretization.
Can you try the case with the following sets of schemes and see what happens?

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

March 7, 2020, 06:55

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

First, you do not need to run the case for 20...

First, you do not need to run the case for 20 seconds in order to investigate the validity of the result, just compare one complete cycle after reaching periodic state.
With the default tutorial...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

March 6, 2020, 07:18

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Hello, Would you please explain how did you...

Hello,

Would you please explain how did you plot the y-displacement?
Because there is a gnuplot script provided with the tutorial which is supposed to plot y and x displacement of the tip.

By...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

March 6, 2020, 06:52

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Hi, I'm using foam-extend-4.0 and OpenFOAM-7...

Hi,

I'm using foam-extend-4.0 and OpenFOAM-7 for now.
I did not change anything else and the simulation finished normally.

Which version of foam-extend are you using?
It seems that something...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

March 4, 2020, 14:46

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Well in FSI cases, most of the time bad initial...

Well in FSI cases, most of the time bad initial condition at start time causes the simulation to collapse.
This is the result after 1.8sec and everything is still stable.

Edit: added result for...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

March 4, 2020, 10:44

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Hi Sita, I have looked through the attached...

Hi Sita,

I have looked through the attached case and made three minor changes:

1- file: fsiProperties:

disabled couplingStartTime and set coupled to yes.

2- file: 0/U

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

May 13, 2014, 22:11

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Hi Dr. Cardiff Have you ever tried the FSI...

Hi Dr. Cardiff

Have you ever tried the FSI solver using velocityLaplacian mesh motion solver in parallel?
I am facing an error:

Constructing processor meshes

Processor 0
Number of...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

December 21, 2013, 17:12

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Hello Dr. Cardiff I have a question about...

Hello Dr. Cardiff

I have a question about running a turbulence case with FSI solver. I have successfully changed the fluid solver according to pisoFoam solver. Now the FSI solver is able to model...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

October 3, 2013, 16:49

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

thanks Dr. Cardiff As for the last comment,...

thanks Dr. Cardiff

As for the last comment, yes you are right. Now I am clamping those patches with fixed displacement in every direction.

I will work on FSI patch boundary condition. Actually...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

September 30, 2013, 13:50

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Nice to have you back :rolleyes: thanks for...

Nice to have you back :rolleyes:

thanks for the answer.

well I have read 4 papers so far on coupling algorithm, Fixedrelaxation, Aitken and IQN-ILS. But I can not understand why fsi under...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

September 29, 2013, 11:29

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Hello Dr. Cardiff I have tested my case with...

Hello Dr. Cardiff

I have tested my case with fixedRelaxationFactor method with value of 0.2 and the solution will converge and FSI residual reduces smoothly and after 43 outer iterations it will...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

September 24, 2013, 18:44

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Hi Dr. Cardiff I am working on simulation of...

Hi Dr. Cardiff

I am working on simulation of flexible pipe with FSI solver.
I have changed the fluid solver to use pimple algorithm.

I have a question about FSI outer corrector:

In my...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

September 16, 2013, 14:02

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Hi Dr. Cardiff sorry for lots of...

Hi Dr. Cardiff

sorry for lots of questions:rolleyes:

Does FSI solver support topological changes in the fluid region?
I want to use dynamicTopoFvMesh for my test case, I have problems with...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

September 15, 2013, 17:14

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

@ Dr. Cardiff I want to use...

@ Dr. Cardiff

I want to use dynamicRefineFvMesh as a dynamicFvMesh in dynamicMeshDict on FSI solver. I have changed what I think is necessary for dynamicRefineFvMesh.

But I am still getting...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

September 4, 2013, 13:06

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Hi Anna were you able to run the FSI case in...

Hi Anna

were you able to run the FSI case in parallel without any problem? (completely I mean, end of simulation time)
I have a problem you can see in this post : click...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

August 26, 2013, 14:31

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

@ bigphil today I have compiled...

@ bigphil

today I have compiled OpenFOAM-1.6-ext with openmpi-1.5 but the problem is still there.
could something be wrong with the tutorial case setup or you don't have this problem on your own...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

August 21, 2013, 16:31

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

@ Philip I am very sorry but I was mistaken,...

@ Philip

I am very sorry but I was mistaken, the problem is still there. I was in hurry and entered the parallel command with out noticing that I have drop the main part: :eek:

I used "mpirun...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

August 21, 2013, 13:27

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

The main reason is I want to simulate blood flow...

The main reason is I want to simulate blood flow and if I know that Aitken underrelaxation method can handle it, I don not need IQN-ILS scheme anymore.
The problem is when I change rhoSolid=1000...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

August 21, 2013, 09:06

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

I want to add IQN-ILS scheme for FSI solver, do...

I want to add IQN-ILS scheme for FSI solver, do you have any paper to describe the algorithm?
does it need huge modification on the base code?

regards

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

August 21, 2013, 07:56

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

I think I got the error fixed. I have...

I think I got the error fixed.

I have changed the following in the code you've attached:

for newPoints I changed "mesh" to "stressMesh" (solid mesh)

I will test and report if the main error...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

August 21, 2013, 07:39

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

first, thanks for your attention Philip;) I...

first, thanks for your attention Philip;)

I have recompiled the the code with "moveSolidMeshLeastSquares.H" you've provided.
I get floating point exception in both parallel and serial runs after...

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

August 12, 2013, 13:03

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

Thanks Philip everything is just fine till...

Thanks Philip

everything is just fine till t=0.065 sec..
before this time the solution was converging just like the serial run.
I was simulating the provided case without any changes.

Forum: OpenFOAM CC Toolkits for Fluid-Structure Interaction

August 7, 2013, 19:40

Replies: 686

[solidMechanics] Support thread for "Solid Mechanics Solvers added to OpenFOAM Extend"

Views: 97,229

Posted By Daniel_Khazaei

@ bigphil...

@ bigphil (http://www.cfd-online.com/Forums/members/bigphil.html)

I am trying to use icoFsiElasticNonLinULSolidFoam in parallel.
I am running the tutorial case you have provided.
but I get the...

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