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A Homogeneous Equilibrium Model Improved for Pipe Flows

—The homogeneous equilibrium model improved (HEMI) is for determining the mass flux of all fluids in piping systems. Existing homogeneous equilibrium models tend to underpredict overall pressure drops in piping systems as the flow length is increased. HEMI has corrected the fundamental defect and the associated flow equation is both mathematically and physically satisfactory. The HEMI can also be extended to account for non-equilibrium effects. The resulting calculation sets are compared with experimental data.