[hadip]

hi
I tried to solve heat transfer with solver "buoyantBoussinesqSimpleFoam" and I changed tutorial file of that and I get following error:
Reading field alphat



--> FOAM FATAL IO ERROR:
Cannot find patchField entry for topAndBottom

file: /home/hadi/OpenFOAM/hadi-5.0/run/hotRoom/0/alphat.boundaryField from line 26 to line 46.

From function void Foam::GeometricField<Type, PatchField, GeoMesh>::Boundary::readField(const Foam:imensionedField<TypeR, GeoMesh>&, const Foam::dictionary&) [with Type = double; PatchField = Foam::fvPatchField; GeoMesh = Foam::volMesh]
in file /home/ubuntu/OpenFOAM/OpenFOAM-5.x/src/OpenFOAM/lnInclude/GeometricBoundaryField.C at line 191.


and blockMesh of my problem is :

convertToMeters .001;

vertices
(
(0 0 0)
(75 0 0)
(75 75 0)
(0 75 0)
(0 0 1)
(75 0 1)
(75 75 1)
(0 75 1)
);

blocks
(
hex (0 1 2 3 4 5 6 7) (150 150 1) simpleGrading (1 1 1)
);

edges
(
);

boundary
(
frontAndBack
{
type empty;
faces
(
(0 1 5 4)
(2 3 7 6)
);
}

topAndBottom
{
type wall;
faces
(
(4 5 6 7)
(3 2 1 0)
);
}

hot
{
type wall;
faces
(
(4 7 3 0)
);
}

cold
{
type wall;
faces
(
(6 5 1 2)
);
}
);

mergePatchPairs
(
);

also I should say I changed the flow to laminar in turbulenceProperties :
simulationType laminar;

RAS
{
RASModel laminar;

turbulence off;

printCoeffs off;
}
cold you help me please the reason of this error???????
of course the alphat file is following
dimensions [0 2 -1 0 0 0 0];

internalField uniform 0;

boundaryField
{
frontAndBack
{
type empty;

topAndBottom
{
type alphatWallFunction;
Prt 0.85;
value uniform 0;
}

hot
{
type alphatWallFunction;
Prt 0.85;
value uniform 0;
}

cold
{
type alphatWallFunction;
Prt 0.85;
value uniform 0;
}
}
thanks

[wildfire230]

You are missing a right bracket after:


frontAndBack
{
type empty;
}