Heat Transfer in Dual Continuous Flow of Two Immiscible Liquids

In this study، heat transfer coefficients are measured for diesel-water two-phase flow in a horizontal pipe for dual continuous، dispersion of oil in water and dispersion of water in oil flow patterns. Flow patterns are observed using high speed photography for diesel-water mixture and two phase heat transfer data are obtained under a uniform heat flux boundary condition. The test section is a 1. 1 mm ID pipe with a 1. 8 m length. The Reynolds number is distributed from about 350 to 3،700 for diesel and from about 1،300 to 13،700 for water. The results show that the heat transfer coefficient of dual continuous pattern is higher than that of dispersion of water in oil pattern.