Computational fluid dynamics of multiphase flow in hydrocracking reactor based on porous media

The Eulerian multiphase flow model, the energy conservation model, heat transfer and mass transfer model were used to numerically simulate the multiphase flow, the heat and mass transfer within the porous media of the hydrocracking reactor. The overall flow field in the porous media bed, temperature distribution, mass transfer and the pressure distribution of the hydrocracking reactor were obtained. The results showed that the multiphase flow model selection, heat and mass transfer models and computational model could more accurately describe the state and distribution of three-phase flow. The flow conditions at the entrance of the reactor will be passed directly to the interior, surface flow of the reactor will be the current developed, from the macro view, which could be described as the radial bed in the export volume fraction curve inflection point, and then the fluid in the radial and axial direction of the catalyst bed uneven distribution of gasification rate may be raised. Finally in order to get a better bed fluid distribution in the reactor, and get a full used of the catalyst efficiency, the reactor must be optimized at the entrance boundary conditions.