[kupiainen]

Dear all what is
mesh.surfaceInterpolation::deltaCoeffs()?
best regards

[henry]

1/distance between cell centres across the faces (with adjustment for non-orthogonality).

[kupiainen]

I am afraid that these values are not computed correctly in my 1D application. I have a uniform mesh [-5,5] with 1000 cells generated with blockMesh, which would mean that mesh.surfaceInterpolation::deltaCoeffs() should be uniformly 100, but instead

DeltaCoeffs= dimensions [0 -1 0 0 0 0 0];

internalField nonuniform List<scalar>
999
(
40956.7
40915.3
40873.9
40832.5
40791.1
40749.8
40708.4
40667
40625.6
40584.2
....

611.791
572.431
533.179
494.062
455.114
416.384
377.936
339.869
302.324
265.524
229.827
195.835
164.614
138.068
119.387
)
;


boundaryField
{
left
{
type calculated;
value uniform -21966.1;
}
right
{
type calculated;
value uniform 225.004;
}
empty
{
type empty;
}
}
which is wrong.
I tested also for a 2D grid, but here the output is correct. What are boundaryFields used for? For the 2D grid these values are twice the internalfield.

Is the problem in blockMesh or elsewhere you think?
my blockMeshDict looks like
convertToMeters 1;

vertices
(
(-5 0 0)
(5 0 0)
(5 0.01 0)
(-5 0.01 0)
(-5 0 0.01)
(5 0 0.01)
(5 0.01 0.01)
(0 0.01 0.01)
);

blocks
(
hex (0 1 2 3 4 5 6 7) (1000 1 1) simpleGrading (1 1 1)
);

edges
(
);

patches
(
patch left
(
(0 4 7 3)
)
patch right
(
(1 2 6 5)
)
empty empty
(
(0 1 5 4)
(5 6 7 4)
(3 7 6 2)
(0 3 2 1)
)
);

mergePatchPairs
(
);

best regards

[niklas]

Hi,

Have you checked, loooked at, your mesh?
It looks, to me, like the last point is incorrect/misplaced.

Which, again to me, is indicated by these values not being what you expect.

N

[kupiainen]

Correct, my mistake. Thank you Niklas!
Now it works, but I'm still puzzeled about the boundary values. Why are they twice the inner values?