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Overset simulation fails when using 2 close together overset + background mesh

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Old   January 7, 2021, 03:36
Default Overset simulation fails when using 2 close together overset + background mesh
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Hi,

I'm trying to do an Overset simulation using 2 close together overset mesh + background mesh.

Running the simulation fail at the 1st step:

Starting time loop

Courant Number mean: 7.37384e-05 max: 0.372695
deltaT = 1.13415e-06
Time = 1.13415e-06

DICPCG: Solving for cellDisplacementx, Initial residual = 0, Final residual = 0, No Iterations 0
DICPCG: Solving for cellDisplacementy, Initial residual = 0, Final residual = 0, No Iterations 0
DICPCG: Solving for cellDisplacementz, Initial residual = 0, Final residual = 0, No Iterations 0
inverseDistance : detected 3 mesh regions
zone:0 nCells:99944 voxels45 45 45) bb-2.40001 -3.20001 0.787492) (1.02223 3.20001 4.20001)
zone:1 nCells:1673167 voxels45 45 45) bb-20 -16 -21) (-11.2 -9.59999 -12.6)
zone:2 nCells:561796 voxels45 45 45) bb0.762133 -0.15 1.46762) (1.03484 0.162967 1.69862)
Overset analysis : nCells : 2334907
calculated : 511840
interpolated : 106650 (interpolated from local:0 mixed local/remote:0 remote:106557)
hole : 1716417

PIMPLE: iteration 1
[3] #0 [4] #0 [5] #0 [7] #0 Foam::error:rintStack(Foam::Ostream&)Foam::error :rintStack(Foam::Ostream&)Foam::error:rintStac k(Foam::Ostream&)Foam::error:rintStack(Foam::Ost ream&)--------------------------------------------------------------------------
...


However, if I separate the 2 overset mesh a distance away, then the simulation works.

So what's the problem? The overset mesh are close to one another, but they are not touching.

Have anyone encounter this before and found a solution?

Thanks.
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