Abstract
A method was developed for the measurement of velocity and slug length of twoand three-phase flow in capillaries. The method consists of the combination of animpedance meter and two IR sensors. Non-intrusive measurement of the velocitycan be performed with the IR sensors in gas–liquid and gas–liquid–liquid flowusing the intrinsic absorbance of the fluids. In liquid–liquid (l–l) flow thevelocity is measured using a combination of reflectance and refraction of theIR light on the l–l interfaces. The three phases, gas, organic liquid andwater, can be discriminated and their slug lengths determined with thecombination of the signal from the impedance meter and the IR sensor.
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