Supercritical water flow over a spherical particle

SCWFBR (supercritical water fluidized bed reactor), which was used to gasify biomass and produce hydrogen gas, is a new member of fluidized bed family. In order to investigate heat transfer between supercritical water and single particle, numerical studies have been conduced for fist time. By comparing with experimental correlation, the model used in this work was proved to be valid. The study shows that variable properties affect on drag coefficient and Nusselt number greatly. Buoyancy force by gravity enhances heat transfer from the surface before separation point of particle to fluid, but decreases the heat transfer from the surface after separation point of particle to fluid wave. Those results are helpful for further studying heat transfer in SCWFBR.