[Saideep]

Dear Foamers;

I was trying to figure this out but failed to understand the following line,

dimensionedScalar rAUf("rAUf", dimTime/rho.dimensions(), 1.0);

The above line of code is from interFOAMs correctPhi.

We create a variable name rAUf referring to the diagonal elements of the Navier Stokes Equation at face centres.

Questions:

1. What does, dimTime/rho.dimensions() mean?

2. What does the third argument of integer 1.0 passed to the rAUf variable mean?

Thanks for your patience and time.

[jherb]

You can use the search feature of github to search in the OpenFOAM repository. So looking for dimension dimTime results in:
https://github.com/OpenFOAM/OpenFOAM...C%93&q=dimTime
with this first result:
https://github.com/OpenFOAM/OpenFOAM...ionSets.C#L177

const dimensionSet dimTime(0, 0, 1, 0, 0, 0, 0);

and looking for dimensions() by https://github.com/OpenFOAM/OpenFOAM...3A.H&type=Code

so the method dimensions() is defined (probably also elsewhere):
https://github.com/OpenFOAM/OpenFOAM...3A.H&type=Code

which returns the dimension of a dimensioned field.

I do not know which solver you use, but here is an example of the definition of the rho (density) field:
https://github.com/OpenFOAM/OpenFOAM...ateFields.H#L7

Again searching for rhothermo leads to this file:
https://github.com/OpenFOAM/OpenFOAM...hoThermo.C#L53
and finally looking for dimDensity:
https://github.com/OpenFOAM/OpenFOAM...ionSets.C#L190
dimMass and dimVolume can be searched also:
https://github.com/OpenFOAM/OpenFOAM...ionSets.C#L175
https://github.com/OpenFOAM/OpenFOAM...ionSets.C#L184
(dimLength is defined also in this file).

So at the end you define a scalar with dimensions s/(kg/m³) and set it the the value 1 s/(kg/m³)