St. Revankar et M. Ishii, THEORY AND MEASUREMENT OF LOCAL INTERFACIAL AREA USING A 4 SENSOR PROBE IN 2-PHASE FLOW, International journal of heat and mass transfer, 36(12), 1993, pp. 2997-3007
A theoretical foundation of the measurement method for the time averag
ed local interfacial area using a four sensor resistivity probe is pre
sented. Based on this theory, the four sensor resistivity probe was de
veloped and employed to measure the interfacial velocity, local interf
acial area concentration and void fraction in a vertical air water cap
bubbly flow. The four sensor probe measurements were checked against
the global void measurement using a differential pressure. The results
were very satisfactory. Theoretical profiles of the void fraction and
interfacial area concentration were obtained using the pictures of ca
p bubbles. The theoretical predictions of the cap bubbles and the inte
rfacial area concentration profiles compared very well with the four s
ensor data.