Heat transfer coefficients of oil-water two-phase flow for different flow patterns in the horizontal and slightly upward inclined (+4° and +7°) were measured.

Two-phase Heat transfer coefficients were dependent on the flow patterns and the inclination angles.

Artificial neural network is used for predicting the heat transfer coefficient of two-phase flow in defferent situations.

ANN predictions have very good agreement with experimental data for all positions and flow patterns.