Hi people ! I used to run 2
Hi people !
I used to run 2D fluid-structure interaction simulation with "closed" fluid-solid interface (see case A in the attachment). My current installation is OpenFOAM 1.4.1-dev revision 784.
Now, if I update my OpenFOAM installation to the latest 1.4.1-dev or even to the latest 1.5-dev version, those kind of simulation don't work anymore. However, if the fluid-solid interface is "open" (see case B in the attachment), then there is no problem at all (in all version).
The following package contains both cases A and B that can be run with the standard icoFsiFoam solver. More details are also provided in a pdf file.
Any help would be appreciated ! Kind regards,
Sorry, I do not get it. I hav
Sorry, I do not get it. I have just run caseA and I can see forces being transferred, a flow field, a structural deformation field and a moving mesh for both the fluid and the solid.
When you say "it does not work any more", what precisely does not work:
- the case does not run
- you get a floating point exception
- you do not get the flow field
- you do not get structural deformation
- you do not get mesh motion
- force transfer is not correct
I am missing something, but don't know what...
More info please,
Got it: this is to do with a s
Got it: this is to do with a search algorithm for a multiply projected boundary (thank Gavin and his FSI artery simulation).
Whta happens is that for a closed surface with escapes, you cannot guarantee the projection will be correct using the fast algorithm. I have changed the switch in
in the OptimisationSwitches section and all works well. The deformation on the solut surface looks a bit stupid (you may want to use mesh motion to deform that side as well), but at least we know what the problem (and solution) are.
Dear Hrv, Thanks for the re
Thanks for the reply ! I changed nSquaredProjection to 1 and the problem seems to be gone. Thanks again,
Dear Hrv, I investigated th
I investigated this issue further and I found that there is still a problem with the mesh when using OF-1.5-dev with nSquaredProjection set to 1 (no more problems in the latest revision of 1.4.1-dev though!). See the right tip of the plate in the following pictures.
Is there something else I am missing or is this a bug ?
By the way, what did you mean by "solut surface" in your last message ?
This is the kind of work I do
This is the kind of work I do under a support contract. Alternatively, you have a dig through the code yourself.
Have you fixed the error in 1.5-dev version for icoFSIFoam solver. As u stated 1.4-dev vrsion has no problems, Do I lack something if i use that version.
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