NUMERICAL-SIMULATION ON GAS-SOLID 2-PHASE TURBULENT-FLOW IN FCC RISERREACTORS (II) NUMERICAL-SIMULATION ON THE GAS-SOLID 2-PHASE TURBULENT-FLOW

Numerical simulation on the flow, heat transfer and cracking reactions in commercial fluid catalytic cracking(FCC)riser reactors were carrie d out employing the developed turbulent gas-solid two-phase flow-react ion model for FCC riser reactors given in Part I of the present paper. Detailed information about the turbulent flow fields in the riser rea ctor obtained revealed the basic characteristics of the gas-solid two- phase turbulent flows when heat transfer and catalytic cracking reacti ons were co-existing in the riser. Results showed that the distributio ns of the flow, the turbulence kinetic energy and the catalyst particl e concentration are not uniform in the axial, radial and tangential di rections. The most complicated part of the riser reactor is the feed i njecting zone. The complicated configuration of the turbulent gas-soli d two-phase flows would exert a great influence on the results of inte rphase heat transfer and cracking reactions.