Ansari Functions
Ansari et al. (1994) mechanistic model with flow-pattern-specific closures.
3 functions
PO.VFP.Ansari.dPdL(Ql, Qg, P, Rho_l, Ul, Bl, Rho_g, Ug, Bg, IFT_gl, Rs, pipe_ID, pipe_roughness)
Calculates pressure gradient using Ansari et al. (1994) mechanistic model, [psi/ft]. TUFFP industry standard for vertical upward flow.
PO.VFP.Ansari.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 Ansari et al. (1994), [psi]. Vertical wells. Gas properties (ρg, μg, Bg) use DAK (Z-factor) and LGE (viscosity).
PO.VFP.Ansari.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 Ansari et al. (1994), [psi]. Vertical wells. Gas properties (ρg, μg, Bg) use DAK (Z-factor) and LGE (viscosity).