Graduation with Distinction

ii It is essential to determine the flow regime for gas-liquid two-phase flows since many constitutive models are flow regime dependent. In this study, an instrumentation system together with an air-water two-phase flow test facility was tested to determine if such a system can detect different flow regimes mechanistically. This instrumentation system will be used in the future to determine the effect of the inlet bubble size on downstream flow regime and interfacial structure development. Some modifications were made to the test facility including installing a larger air-water separator and changing the inlet water lines to allow for independent control and measurement of the flow rate of the auxiliary water line. The instruments that were installed are; 1. a high-speed video camera that is placed at the inlet of the test section to record a video representation of the inlet flow conditions; 2. a pressure transducer installed to measure the inlet pressure and a differential pressure transducer to measure the pressure drop across the test section, which can be used to estimate the void fraction when it is small; and 3