Hi,

I would like to know why openfoam uses a scaling factor of 0.5 to calculate Co number.

Co = U * dt/ dx.(1) {normal form}

Co = (0.5 * phi * dt)/V_cell.(2) {OF manipulated form of (1)} OF considers surface sum of fluxes along all faces of cell and divides it by cell volume. We are multiplying and dividing (1) with surface area of cell. This is the way it is also specified in Henrik's thesis as well without a scaling of 0.5. Any idea?