IOobject Function+interPhaseChangeFoam
 

nu_
(
IOobject
(
"nu",
U_.time().timeName(),
U_.db()
),
U_.mesh(),
dimensionedScalar("nu", dimensionSet(0, 2, -1, 0, 0), 0),
calculatedFvPatchScalarField::typeName
)
whats the meaning of db() ????

is there any tutorial to work with IOobject ?

i want to add a constant to a transportPropertiesDic in subDic alpha1
in interPhaseChangeFoam, what should i do?

db() of U_ is the mesh of the model!