Aziz Excel Functions

`PO.VFP.Aziz.dPdL(Ql, Qg, P, Rho_l, Ul, Bl, Rho_g, Ug, Bg, IFT_gl, Rs, pipe_ID, pipe_roughness)`

Calculates pressure gradient using Aziz et al. (1972) drift-flux model, [psi/ft]. Vertical wells, basis for mechanistic models.

`PO.VFP.Aziz.Pout(Ql, Qg, P_in, T_degF, Rho_l, Ul, SG_gas, IFT_gl, pipe_ID, pipe_length, pipe_roughness)`

Calculates outlet pipe pressure using Aziz et al. (1972), [psi]. Vertical wells. Gas properties (ρg, μg, Bg) use DAK (Z-factor) and LGE (viscosity).

`PO.VFP.Aziz.Pin(Ql, Qg, P_out, T_degF, Rho_l, Ul, SG_gas, IFT_gl, pipe_ID, pipe_length, pipe_roughness)`

Calculates inlet pipe pressure using Aziz et al. (1972), [psi]. Vertical wells. Gas properties (ρg, μg, Bg) use DAK (Z-factor) and LGE (viscosity).