ABSTRACT
SYSTEMS This Chapter presents applications of the adjoint sensitivity analysis procedure
(ASAP) to transient one-dimensional two-phase flow problems modeled by wellposed quasi-linear partial differential equations (PDE’s). The material in this chapter is structured in two main sections. Thus, Section II.A presents a selfcontained formalism for sensitivity analysis of functional-type responses associated with two-phase flow models that comprise equations describing conservation of mass, momentum, and energy for practical one-dimensional, two-phase flow models. In particular, the characteristics of applying the ASAP to the so-called homogeneous equilibrium model (HEM) are analyzed in detail.
