Is it possible to combine stress and flow solvers in OpenFOAM?

sur4j · April 12, 2014, 16:26

I am wondering if this has been done already, for example if I want to simulate a complex seal arrangement in which I would like to see how the applied fluid flow pressures deform the sealing element.

I have read that in most cases two separate simulations are ran, one for flow analysis and the other for stress however, in the above application it would require a large number of simulations which would not be practical.

sur4j · April 16, 2014, 15:53

Could someone please tell me if this combination of solvers is possible or not, for example combining the deformation obtained from solidDisplacementFoam with another flow solver so that they are both ran simultaneously to see how the fluid pressures deform the body?
Would it require a large amount of work to implement?

fabian_roesler · April 17, 2014, 09:23

Hi

yes it is possible. What you are searching for is called "Fluid structure interaction (FSI)". However I never used the solvers and I think they are only implemented in the extend version.

http://www.cfd-online.com/Forums/ope...-openfoam.html

http://openfoam-extend.sourceforge.n...re_Interaction

Hope this helps.
Cheers

Fabian

sur4j · April 17, 2014, 16:43

Thank your reply. From what I have read the FSI requires an FEA package to do the structural analysis component of the simulation, I have also seen a couple of posts on this forum mentioning that OpenFOAM supports this and has it's own FEA simulation capibilities. Is this true? If so, are you aware of any documentation that is available for this?

Thanks.

fabian_roesler · April 24, 2014, 04:39

Hi,

I don't know if this is what you are searching for but OpenFOAM has several solvers for stress Analysis. They still use the FV-Method but can calculate linear-elastic, small-strain deformation of a solid. Here the information for solidDisplacementFoam:

Transient segregated finite-volume solver of linear-elastic, small-strain deformation of a solid body, with optional thermal diffusion and thermal stresses.
Simple linear elasticity structural analysis code. Solves for the displacement vector field D, also generating the stress tensor field sigma.

Cheers

Fabian

April 12, 2014, 16:26	Is it possible to combine stress and flow solvers in OpenFOAM?	#1
sur4j Member Join Date: Aug 2013 Posts: 60 Rep Power: 13	I am wondering if this has been done already, for example if I want to simulate a complex seal arrangement in which I would like to see how the applied fluid flow pressures deform the sealing element. I have read that in most cases two separate simulations are ran, one for flow analysis and the other for stress however, in the above application it would require a large number of simulations which would not be practical.

April 17, 2014, 09:23	Fluid structure interaction (FSI)	#3
fabian_roesler Senior Member Fabian Roesler Join Date: Mar 2009 Location: Germany Posts: 213 Rep Power: 18	Hi yes it is possible. What you are searching for is called "Fluid structure interaction (FSI)". However I never used the solvers and I think they are only implemented in the extend version. http://www.cfd-online.com/Forums/ope...-openfoam.html http://openfoam-extend.sourceforge.n...re_Interaction Hope this helps. Cheers Fabian hua1015 and sur4j like this.

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April 16, 2014, 15:53		#2
sur4j Member Join Date: Aug 2013 Posts: 60 Rep Power: 13	Could someone please tell me if this combination of solvers is possible or not, for example combining the deformation obtained from solidDisplacementFoam with another flow solver so that they are both ran simultaneously to see how the fluid pressures deform the body? Would it require a large amount of work to implement?

April 17, 2014, 16:43		#4
sur4j Member Join Date: Aug 2013 Posts: 60 Rep Power: 13	Thank your reply. From what I have read the FSI requires an FEA package to do the structural analysis component of the simulation, I have also seen a couple of posts on this forum mentioning that OpenFOAM supports this and has it's own FEA simulation capibilities. Is this true? If so, are you aware of any documentation that is available for this? Thanks.

April 24, 2014, 04:39		#5
fabian_roesler Senior Member Fabian Roesler Join Date: Mar 2009 Location: Germany Posts: 213 Rep Power: 18	Hi, I don't know if this is what you are searching for but OpenFOAM has several solvers for stress Analysis. They still use the FV-Method but can calculate linear-elastic, small-strain deformation of a solid. Here the information for solidDisplacementFoam: Transient segregated finite-volume solver of linear-elastic, small-strain deformation of a solid body, with optional thermal diffusion and thermal stresses. Simple linear elasticity structural analysis code. Solves for the displacement vector field D, also generating the stress tensor field sigma. Cheers Fabian