Direct numerical simulation of stably-stratified turbulent channel flows with CO2 supercritical pressure

In this study, Direct Numerical Simulations of stably-stratified turbulent channel flows with CO2 supercritical pressure were conducted to investigate strongly property change and buoyancy effects on turbulent structures and heat transfer. Caused from high-Pr effects near critical point, buoyancy effects on flow laminarization were reduced and temperature intensity was increased near channel center. Correlation terms of property change and turbulent convective motion were dominant factor but correlation terms of property change and heat conduction were inactive for the mean-temperature equation budget. (author)