Numerical methods for thermally expandable two-phase flow - computational techniques for steam generator modeling

Equations and constitutive relations describing two-dimensional, thermally expandable, homogeneous, two-phase flow are presented and discussed. Four numerical solution methods of these equations are reviewed in detail. A fully and linearly implicit numerical method is developed that utilizes a dual variable transformation technique to substantially reduce the size of the matrix required for inversion at each time step. A computer code (DUVAL) incorporating this dual variable method is discussed, and preliminary numerical results are presented