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[FSI] fsifoam mismatching faces problem

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Old   March 9, 2021, 21:21
Default fsifoam mismatching faces problem
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han
Join Date: Sep 2019
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Hi,there
I am creating solid and fluid meshes with blockMesh, adapted from the tutorials beamInCrossFlow, however, when I change the beam thickness to certain small value, the faces become mismatch.
I also try 10 times size of the all metioned mesh, problem still exists.
I believe there is a relative coefficient of the interface to the global size of the fluid mesh, to enable large displacement of solid interface to move in a timestep.

but I cannot figure out where it is, and how can I modify it??

here is the log for mismatching face. seems like a fluid face belongs to the interface-zone find the wrong solid face


Quote:
Create time

Create dynamic mesh for time = 0

Selecting dynamicFvMesh dynamicMotionSolverFvMesh
Selecting motion solver: velocityLaplacian
Selecting motion diffusion: quadratic
Selecting motion diffusion: inverseDistance
Reading stress mesh
Creating traction displacement boundary conditions
Creating fixed displacement boundary condition
Selecting rheology model linearElastic
Creating constitutive model
Selecting coupling scheme Aitken

Starting time loop

Time = 0.0005

Create extended GGI zone-to-zone interpolator
Checking fluid-to-solid face interpolator
Fluid-to-solid face interpolation error: 0.05
Checking solid-to-fluid point interpolator (GGI)
Extended GGI, master point distance, max: 0, avg: -0.0457143, min: -0.1
Extended GGI, master point orientation (<0), max: 1, min: -1, nIncorrectPoints: 32/70
Solid-to-fluid point interpolation error (GGI): 0.1
Number of uncovered master faces: 0
Number of uncovered slave faces: 0
And if I only change the thickness of the beam to a big value,and keep the other mesh size still.

Quote:
Create time

Create dynamic mesh for time = 0

Selecting dynamicFvMesh dynamicMotionSolverFvMesh
Selecting motion solver: velocityLaplacian
Selecting motion diffusion: quadratic
Selecting motion diffusion: inverseDistance
Reading stress mesh
Creating traction displacement boundary conditions
Creating fixed displacement boundary condition
Selecting rheology model linearElastic
Creating constitutive model
Selecting coupling scheme Aitken

Starting time loop

Time = 0.0005

Create extended GGI zone-to-zone interpolator
Checking fluid-to-solid face interpolator
Fluid-to-solid face interpolation error: 2.22478e-16
Checking solid-to-fluid point interpolator (GGI)
Extended GGI, master point distance, max: 0, avg: 0, min: 0
Extended GGI, master point orientation (<0), max: -0.707107, min: -1, nIncorrectPoints: 0/82
Solid-to-fluid point interpolation error (GGI): 2.30555e-16
Number of uncovered master faces: 0
Number of uncovered slave faces: 0
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