# fluid orce to solid patch icofsifoam

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 February 9, 2020, 13:25 fluid orce to solid patch icofsifoam #1 New Member   xena Join Date: Mar 2019 Posts: 10 Rep Power: 2 Hello, My question is about the fluid force applied on the solid patch in icodymfoam, what we find in setMotion.H, is juste pressure, !! Is the correct force implemented elsewhere ? regards

 February 9, 2020, 15:03 #2 Senior Member   Herpes Free Engineer Join Date: Sep 2019 Posts: 298 Rep Power: 3 The Q is a bit broad, isn't it? __________________ Kind regards, HPE The OpenFOAM community is the biggest contributor to OpenFOAM; not person A or B. Let's report bugs or issue feature requests in GitLab-OpenFOAM. Please `design` your questions well. Such effort always pays off well for inquirers and `helpmate`s: How to create a Minimal, Reproducible Example, How to give enough info to get help.

February 10, 2020, 03:47
#3
New Member

xena
Join Date: Mar 2019
Posts: 10
Rep Power: 2
Quote:
 Originally Posted by HPE The Q is a bit broad, isn't it?
ok sorry, i will explain it better.
at the fluid-structure interface, we have as BC the equality of constraints (file attached). But when I checked in setpressure.H of icodymfoam it looks like this :

{
scalarField solidPatchPressure =
interpolatorFluidSolid.faceInterpolate
(
p.boundaryField()[fluidPatchID]
);

solidPatchPressure *= rho;

tForce.pressure() = solidPatchPressure;

vector totalPressureForce =
sum
(
p.boundaryField()[fluidPatchID]*
mesh.Sf().boundaryField()[fluidPatchID]
);
}

So there isn't the part of the force due to the velocity and the viscosity.

Am I rignt, or is it done elswhere in the code.

Regards
Attached Images
 contrainte-fluide.PNG (5.5 KB, 3 views)

 February 18, 2020, 17:37 #4 Senior Member   Herpes Free Engineer Join Date: Sep 2019 Posts: 298 Rep Power: 3 Oh yeah, I think so. I think what you are looking for is an active research topic, thats why it is not available thereat or somewhere else I think. __________________ Kind regards, HPE The OpenFOAM community is the biggest contributor to OpenFOAM; not person A or B. Let's report bugs or issue feature requests in GitLab-OpenFOAM. Please `design` your questions well. Such effort always pays off well for inquirers and `helpmate`s: How to create a Minimal, Reproducible Example, How to give enough info to get help.

 February 24, 2020, 09:54 #5 Super Moderator     Philip Cardiff Join Date: Mar 2009 Location: Dublin, Ireland Posts: 810 Rep Power: 27 Hi, As noted previously, the icoFsiFoam solver only passes pressure to the solid and ignores viscous stresses e.g. see other threads: Fluid Structure Interaction using icoFsiFoam Problems You can try later FSI solvers that include both e.g. extend-bazaar and solids4foam. Philip xena likes this.

February 24, 2020, 10:52
#6
New Member

xena
Join Date: Mar 2019
Posts: 10
Rep Power: 2
Quote:
 Originally Posted by bigphil Hi, As noted previously, the icoFsiFoam solver only passes pressure to the solid and ignores viscous stresses e.g. see other threads: Fluid Structure Interaction using icoFsiFoam Problems You can try later FSI solvers that include both e.g. extend-bazaar and solids4foam. Philip

Thanks,

Is it possible to add it to the current code?
I made some changes, so I want to continue using icofsifoam for the time being!

Regards

 February 24, 2020, 15:10 #7 Super Moderator     Philip Cardiff Join Date: Mar 2009 Location: Dublin, Ireland Posts: 810 Rep Power: 27 Hi xena, You can find steps on the thread in my previous post. Philip