IntroductionVOidfractionwavesisalsonamedconcentrationwavesorkinematicwavesingas-liquidtwo-phaseflow[1].Theyarethepropagationofvoidfractiondisturbancesintwo-phaseflow.VOidfractionwavescanbedetectedbymeasuringfluctuationofmeanvoidfractionoftheflowpipes...