Michael Z Podowski
Rensselaer Polytechnic Institute, USA
Title: On the mechanistic modeling of fluid flow and heat transfer in supercritical-pressure systems
Biography
Biography: Michael Z Podowski
Abstract
Supercritical fl uids are very promising materials for a variety of energy systems. Th e fl uids under consideration include water and carbon dioxide, with the latter being of particular interest for future clean energy technologies. Th e objectives of this lecture are to discuss the progress in the computational modeling of fl uid fl ow and heat transfer in supercritical-pressure systems using the above-mentioned fl uids. Several issues of signifi cant theoretical and practical interest will be discussed, including: challenges in the modeling of forced-convection heat transfer imposed by the eff ect of property variations on turbulence at slightly supercritical pressures and on the associated system dynamics, the analysis of similarities between the properties of water and carbon dioxide and the physical and computational aspects of modeling high-velocity supercritical carbon dioxide (SC-CO2) fl ow inside the complex geometry of rotating machinery, accompanied by high pressure changes. Selected results of computer simulations will be shown using one-dimensional and multidimensional models. Th ey will include both model validation against experimental data and practical applications to predict the hydrodynamic and thermal characteristics of supercritical-pressure systems.