Determining interfacial area density in two-phase, gas-liquid flows is
one of the major elements impeding significant development of predict
ive tools based on the two-fluid model. Currently, these models requir
e coupling of liquid and vapor at interfaces using constitutive equati
ons which do not exist in any but the most rudimentary form. This pape
r describes the theory of impedance imaging of two-phase mixtures and
summarizes bench-type experiments utilized in its development, testing
, and feasibility evaluation.