Analysis and correlation of local condensing heat transfer coefficients for stratified flow inside horizontal two dimensional inner microfin tubes

Through the experiment and analysis, the flow patterns for the horizontal condensing heat transfer inside-a two dimensional inner microfin tube are divided into annular flow, stratified flow and intermittent flow. The flow patterns criteria are given in this paper also. The analysis and calculating correlation of the local condensing heat transfer coefficient for stratified flow inside a two dimensional inner microfin tube have been obtained. The calculated results with the correlation consistent with the experiment data within +/-30%.