[Malthe Eisum]

I'm making my owen solver from icoFoam, where I add a body force B = U0m*(2*pi/period)*cos((2*pi/period)*t).
Where the period and free stream velocity (U0m) is to be loaded fra a dictionary. I think I have figured out the syntax from looking in "createFields.H" to keep it simple I started with the assumption that the variables was gonna be placed in "transportProperties".

IOdictionary transportProperties
(
    IOobject
    (
        "transportProperties",
         runTime.constant(),
         mesh,
         IOobject::MUST_READ,
         IOobject::NO_WRITE
    )
);

scalar period(transportProperties.lookup("period"));
scalar U0m(transportProperties.lookup("U0m"));

added the last two lines, but when I try to make the solver i get the following error:

createFields.H: In function 'int main(int, char**)':
createFields.H:20: error: cannot convert 'Foam::ITstream' to 'Foam::scalar' 
createFields.H:21: error: cannot convert 'Foam::ITstream' to 'Foam::scalar' in initialization

Additional questions

1. What is good practice, shall I add min variables (period,U0m) in the transportPorperties or make an additional dictionary?
2. I need the variables to be of class scalar, what is the syntax in the dictionary? is it as that of an dimensionedScalar omitting the dimension array:

   period     period 9.72;

[Malthe Eisum]

Have spend 48 hours searching for an answer for my problems and the 15 min after posting my thread I find my own answer.

http://www.cfd-online.com/Forums/ope...nt-solver.html