Improvement of buoyancy and acceleration parameters for forced and mixed convective heat transfer to supercritical fluids flowing in vertical tubes

An analytical approach is applied to examine the buoyancy and acceleration effects on forced and mixed convective heat transfer at supercritical pressures. Two non-dimensional parameters have been developed for these effects. In the process of developing the buoyancy parameter (Bu), a new relationship between momentum and thermal boundary layer was used. And the van der Waals equation was adopted in developing acceleration parameter (Ac). …