where R is the ratio of the heat transfer coefficients of the measured value aexp to the reference value a0, which is calculated with the Dittus and Boelter [6] correlation that was developed for conventional single-phase pipe flow:
where R is the ratio of the heat transfer coefficients of the measuredvalue aexp to the reference value a0, which is calculated with theDittus and Boelter [6] correlation that was developed for conventionalsingle-phase pipe flow: