CFD Online Discussion Forums - alphaEff scalarField

I have a question, as I am gradually digging into OpenFOAM for my doctoral research and it is indeed interestingly challenging. So, subsequent to looking up the alphaEff (effective thermal diffusivity), I want these quantities at the wall and the following code is not working thus far:

Code:

IOdictionary LESProperties

    (

        IOobject

        (

            "LESProperties",

            runTime.constant(),

            mesh,

            IOobject::MUST_READ,

            IOobject::NO_WRITE

        )

    );

 dimensionedScalar alphaEff(LESProperties.lookup("alphaEff"));

 const scalarField alphaEffw = alphaEff().boundaryField()[patchI];