cell Reynold number

Dear all,

I have some confusion regarding cell Reynold number option provided in COMSOL post-processing. What I understand is that cell Reynold number is calculated with velocity and length within/from a mesh element. Is it correct? If it is, it will show changes/different value of cell Re when i applied different mesh size, right?
So my question here is, what is the function/usage of cell Reynold number? or in what case it is normally applied?

Thanks a lot!