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1-way coupling & 2-way coupling in FSI problems

alinia's picture

Hi all,
any one know what is difference between "1-way coupling" and "2-way coupling" in FSI problems?
Is there any difference between above methods and "weak coupling" and "strong coupling" methods ?

ChangyongCao's picture

1-way FSI (or called one-direction FSI), typically describes the pure mapping of physical properties resulting from the analysis of a fluid-model to another solid-model, for example, the explosion. The results from fluid model are transferred to solid model only once for all as an external load. No responses are feedback to the fluid model. In other words, the interaction between them is not a complete process, only one direction interaction (fluid to solid) involved.

While in the case of 2-way FSI (or called two-direction FSI), the load mapping is performed in an iterative loop i.e. the results (e.g. pressure) of fluid model are transferred to solid model and the results (e.g. deformations) of solid model are in turn transferred back to the fluid model so as to influence the behavior of fluid part. This iterative process will continue until convergence is found or the process is stopped manually.

I am not sure if it is clear enough. Hope you can understand it.

Regards,

Charson

alinia's picture

Thank you Mr.Charson for your complete comment.I have some question about "2-way FSI" please help me

1- when the process terminates?

2-Does ABAQUS can solve the 2-way FSI problems?

Regards,Alinia

ChangyongCao's picture

It will determined by the given tolerance. You maybe like to check some books on theory of FSI.

As for ABAQUS, I have not used it to do any FSI ssimulation, so I am not sure about it. ABAQUS has only introduced the fluid modeling module for a short time.  

alinia's picture

Thank you

Can you introduce me some books about FSI theory please?

 

alinia's picture

still waiting for helpFrown

 

ChangyongCao's picture

Prof. Klaus-Jürgen Bathe does lots of work on FSI. You can check some papers published by him.

The theory mannual of ADINA is also a good reference. Hope it can help you. 

Regards,

Charson

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