[hy1112006]

Hi everyone,

I am making a new boundary type for the inlet temperature by referring the "parabolicVelocityFvPatchVectorField" and "AblVelInletFvPatchVectorField".

I got confused with the "scalarField" & "const scalar" in the .H and .C files. What is the difference between them?

Can anyone show it with example?

Thanks soo much

[dkxls]

Originally Posted by hy1112006

I got confused with the "scalarField" & "const scalar" in the .H and .C files. What is the difference between them?

A scalar is basically a double or float depending on your compiler settings (roughly speaking). The const in front of a type declaration is just a C++ qualifier: https://en.wikipedia.org/wiki/Const_...programming%29

A scalarField is as field of scalars, as the name says. To stay in OpenFOAM terms a scalarField is basically a List of scalar (with some addons), where a List is OpenFOAM's own array template class.
So, in a general C++ context you could see it as a array of double (roughly speaking).

And since I guess that your next question would be: What is a volScalarField?
Here the answer: A volScalarField is a scalarField defined on the computational mesh. This means a that the size of a volScalarField is equal to the mesh size, hence the values in a volScalarField are linked to the cells in the computational mesh.

Hope this helps to clear things up.

Cheers,
Armin

P.S.: These are very rough explanations to get you started and are by far not complete descriptions.

[hy1112006]

Hi Armin,

Thanks so much for your reply.
It is very helpful.

Sincerely,
Yi

[hy1112006]

Hi Armin,

Thanks so much for your reply.
It is very helpful.

Sincerely,
Yi