Assessment of Mixed Convection Heat Transfer Correlations at Supercritical Pressures

Abstract

Despite the numerous supercritical heat transfer correlations have been proposed in the past several decades, the predictions by using those correlations showed wide discrepancies each other and were not satisfactory. Especially, in a mixed convection heat transfer regime, no correlation was successful in producing accurate predictions. Under a strong buoyancy influence, boundary layer structure is known to deform significantly at a wall temperature close to the pseudocritical temperature. Recently, several correlations have been proposed for the prediction of heat transfer coefficient in both a mixed convection and a forced convection. In this paper, the applicability of those correlations was assessed against the data for CO₂ and water.