[Huqimeng]

Dear All the professions on CFD-Online:

Yesterday, when I used denseParticleFoam to calculate the particle motions (the version of OpenFoam I used is 9.0), the errors were reported as followings:
request for surfaceScalarField phi from objectRegistry region0 failed
available objects of type surfaceScalarField are

3
(
phi.air
alphaPhi.air
alphacf
)

However, it should be noted that I customized the boundary condition files, fvschemes and fvsolution files as what tutorials presented. I added the terms of "phi phi.air" in the boundary files, which is shown as followings (take U as the example):

FoamFile
{
format ascii;
class volVectorField;
location "0";
object U.air;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 1 -1 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
INLET
{
type fixedValue;
value uniform (0 0 0);
inletVelocity uniform (0 0 0);
phi phi.air
alpha alpha.air;
}
FAR
{
type fixedValue;
value uniform (0 0 0);
}
OUTLET
{
type fixedValue;
inletValue uniform (0 0 0);
value uniform (0 0 0);
phi phi.air;
}
DEVICE
{
type fixedValue;
value uniform (0 0 0);
}
RESERVOIR
{
type fixedValue;
value uniform (0 0 0);
}
MOUTHPIECE
{
type fixedValue;
value uniform (0 0 0);
}
OUTER-FLOWCHANNEL
{
type fixedValue;
value uniform (0 0 0);
}
DOSE-CUP
{
type fixedValue;
value uniform (0 0 0);
}
FLOWPATH
{
type fixedValue;
value uniform (0 0 0);
}
}

Did any one know what's wrong.