Abstract
A formulation for the computation of stability and multiphase equilibrium in reacting/non-reacting systems permits the simultaneous calculation of the phase fractions and the stability variables. Based on this formulation an algorithm is given for the coupled stability and isothermal-isobaric flash computations in reacting/non-reacting multiphase systems. This algorithm is extended to handle the isenthalpic flash computations in non-reacting systems. The appearance or disappearance of a phase during the computations is easily handled by incorporating a switching policy in the algorithm. Simultaneous computation of the stability variables and the phase fractions is particularly suited near phase boundaries and for multiphase reactive systems. The effectiveness of the proposed algorithms is illustrated by solving several typical multiphase problems.
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