Abstract
An experimental investigation was performed to study two-phase pressure drop of deionized water in a microchannel. Measurement and evaluation of two-phase frictional pressure gradient were carried out using a single horizontal rectangular microchannel having a hydraulic diameter of 100 ㎛. Tests were performed for mass fluxes of 90, 169, and 267 ㎏/㎡s and heat fluxes of 200-700 ㎾/㎡. Test results showed that the measured two-phase frictional pressure gradient increased with the mass flux and vapor quality. Most macrochannel correlations of two-phase frictional pressure gradient did not provide reliable predictions except under certain limited conditions.
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