| Msure |
November 23, 2021 05:27 |
The results of findCell are different out and in for-loop
Hello everyone,
I came across a problem when I wrote my own solver. I need to use findCell to find the which cell that my point is in. But for the same point, the results of findCell are different out and in my for-loop.
Code:
#include "fvCFD.H"
#include "meshSearch.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
int main(int argc, char *argv[])
{
argList::addBoolOption
(
"noOverwrite",
"increment time to avoid overwriting initial fields"
);
#include "setRootCase.H"
#include "createTime.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#include "createMesh.H"
IOdictionary blockMeshDict
(
IOobject
(
"blockMeshDict",
runTime.system(),
mesh,
IOobject::MUST_READ,
IOobject::NO_WRITE
)
);
IOdictionary NetProperties
(
IOobject
(
"NetProperties",
runTime.constant(),
mesh,
IOobject::MUST_READ,
IOobject::NO_WRITE
)
);
const dictionary& NetDict(NetProperties.subDict("deltaFunction"));
const label nx(blockMeshDict.lookup<scalar>("nx"));
const label ny(blockMeshDict.lookup<scalar>("ny"));
const label nz(blockMeshDict.lookup<scalar>("nz"));
const scalar lx(blockMeshDict.lookup<scalar>("lx"));
const scalar ly(blockMeshDict.lookup<scalar>("ly"));
const scalar lz(blockMeshDict.lookup<scalar>("lz"));
const scalar dx = lx/nx;
const scalar dy = ly/ny;
const scalar dz = lz/nz;
const List<label> offSet_
(
NetDict.lookup("a")
);
meshSearch searchEngine_(mesh);
vector tmpKnotPoint(1.5,0.72,1.359);
vector point1(1.47727,0.694583,1.30181);
vector point2(1.5,0.694583,1.30181);
Pout << "point1 (1.47727 0.694583 1.30181) should be inside cell " << searchEngine_.findCell(point1) << endl;
Pout << "point2(1.5 0.694583 1.30181) should be inside cell " << searchEngine_.findCell(point2) << endl;
vector tmpOffSetPoint;
label num = 0;
forAll(offSet_, zi)
{
tmpOffSetPoint.z() = tmpKnotPoint.z() + offSet_[zi]*dz;
forAll(offSet_, yi)
{
tmpOffSetPoint.y() = tmpKnotPoint.y() + offSet_[yi]*dy;
forAll(offSet_, xi)
{
tmpOffSetPoint.x() = tmpKnotPoint.x() + offSet_[xi]*dx;
label cellId = searchEngine_.findCell(tmpOffSetPoint);
Pout << num << " " << cellId << " " << tmpOffSetPoint << endl;
}
}
}
return 0;
}
and the output:
HTML Code:
point1 (1.47727 0.694583 1.30181) should be inside cell 423586
point2(1.5 0.694583 1.30181) should be inside cell 423587
0 423587 (1.47727 0.694583 1.30181)
0 423587 (1.5 0.694583 1.30181)
0 423785 (1.47727 0.72 1.30181)
0 423785 (1.5 0.72 1.30181)
0 442595 (1.47727 0.694583 1.359)
0 442595 (1.5 0.694583 1.359)
0 442793 (1.47727 0.72 1.359)
0 442793 (1.5 0.72 1.359)
The point1 and point2 should be in 423586 and 423587, but inside the loop, it shows that they are both in cell 423587.
I have no idea about this. I tried mesh.findCell, the same results.
Could anyone tell me what's wrong in this piece of code? Thanks so much! |
