One of the largest experimental databases of measured pressure drops and liquid holdups in high-pressure trickle-bed reactors is presented in order to evaluate the currently existing models for the prediction of hydrodynamic parameters of cocurrent two-phase flow through packed beds. Our findings support the conclusions of Carbonell (Oil & Gas Science and Technology-Revue de l'IFP 55 (2000) 417) based on theoretical analysis of existing models that only the relative permeability model and the fluid-fluid interaction model are based on solid hydrodynamic principles, which are able to predict the hydrodynamic parameters within the experimental error. Special emphasis has been given to the relative permeability model to demonstrate its practicalness in describing the complex phenomena existing within the two-phase flow through porous media.